阅读说明：本技术 一种钢包底吹氩自动对接装置及其使用方法 (Automatic butt joint device for ladle bottom argon blowing and use method thereof ) 是由 刘洪银 李俊玉 刘亚军 王利 张庆峰 亓伟伟 邹春峰 胡增跃 于 2021-08-18 设计创作，主要内容包括：本发明涉及钢铁冶金技术领域,具体为一种钢包底吹氩自动对接装置及其使用方法,该装置包括发射器和接收器,发射器包括定位头和外部吹氩装置,接收器包括接收碗口和钢包的氩气接口；外部吹氩装置包括氩气管连接头,氩气管连接头的轴线与定位头的中轴线重合,氩气管连接头嵌入在定位头内部并与定位头滑动连接,接收碗口的接收碗口顶部的内表面与定位头的面相适应,氩气接口的氩气接口内表面的形状与氩气管连接头外表面的形状相适应,通过电磁铁控制定位头与接收碗口顶部完全重合后,控制氩气管连接头与氩气接口内表面连接,提高钢包底吹氩自动对接精度和对接成功率,操作工艺简单,自动化程度高,减少工人劳动强度。(The invention relates to the technical field of ferrous metallurgy, in particular to a ladle bottom argon blowing automatic butt joint device and a using method thereof, wherein the device comprises a transmitter and a receiver, the transmitter comprises a positioning head and an external argon blowing device, and the receiver comprises a receiving bowl opening and an argon interface of a ladle; outside argon blowing device includes the argon gas pipe connector, the axis of argon gas pipe connector and the axis coincidence of location head, the embedding of argon gas pipe connector is inside at the location head and with location head sliding connection, the internal surface at the receipt bowl mouth top of receiving bowl mouth suits with the face of location head, the shape of the argon gas interface internal surface of argon gas interface suits with the shape of argon gas pipe connector surface, through electro-magnet control location head and the complete coincidence back in receipt bowl mouth top, control argon gas pipe connector and argon gas interface internal surface connection, improve automatic butt joint precision of argon blowing at the bottom of the ladle and butt joint success rate, the operation is simple, the automation is high, reduce workman intensity of labour.)

1. The utility model provides a ladle bottom blowing argon automatic docking device which characterized in that: the device comprises a transmitter and a receiver, wherein the transmitter comprises a positioning head (2) and an external argon blowing device, and the receiver comprises a receiving bowl opening (7) and an argon interface (10) of the ladle; outside argon blowing device include argon gas pipe connector (1), the axis of argon gas pipe connector (1) coincide with the axis of location head (2), argon gas pipe connector (1) embedding inside location head (2) and with location head (2) sliding connection, the internal surface of receiving bowl mouth top (8) of receiving bowl mouth (7) suit with the face of location head (2), the shape of argon gas interface internal surface (9) of argon gas interface (10) suit with the shape of argon gas pipe connector (1) surface, control location head (2) and receiving bowl mouth top (8) after the coincidence completely, control argon gas pipe connector (1) is connected with argon gas interface internal surface (9), open outside argon gas source after, the ladle bottom blowing argon begins.

2. The automatic butt joint device for the bottom blowing argon of the ladle according to claim 1, characterized in that: the external argon blowing device further comprises: tubulose UNICOM pole (4), outside argon blowing device base (5) and argon gas pipe (6), tubulose UNICOM pole with argon gas pipe connector (4) and argon gas pipe (6) intercommunication, tubulose UNICOM pole (4) run through outside argon blowing device base (5) and with outside argon blowing device base (5) fixed connection.

3. The automatic butt joint device for the bottom blowing argon of the ladle according to claim 2, characterized in that: location head (2) be the spheroid, the inside of location head (2) bury underground a plurality of electro-magnet (12), on the section of location head (2) focus was crossed in electro-magnet (12) evenly distributed, cross location head (2) centre of sphere department and open hole (11) that have vertical through, argon gas pipe connector (1) sets up in hole (11), hole (11) in processing have cyclic annular draw-in groove to limit position (3).

4. The automatic butt joint device for the bottom blowing argon of the ladle according to claim 3, characterized in that: and a second electromagnet (13) of the external argon pipe base is embedded in the external argon pipe base (5), and the second electromagnet (13) is uniformly distributed.

5. The automatic butt joint device for the bottom blowing argon of the ladle according to claim 4, characterized in that: permanent magnets (14) are embedded around the argon interface (10), and the permanent magnets (14) are uniformly distributed in the argon interface (10).

6. The automatic butt joint device for the bottom blowing argon of the ladle according to claim 5, characterized in that: the distance from the electromagnet I (12) to the spherical center of the positioning head is 1/2 of the radius of the positioning head, the distance from the electromagnet II (13) to the central axis of the external argon gas pipe base is equal to the distance from the electromagnet I (12) to the spherical center of the positioning head (2), and the distance from the permanent magnet (14) to the central axis of the argon gas interface (10) is equal to the distance from the electromagnet I (12) to the spherical center of the positioning head (2).

7. The automatic butt joint device for the bottom blowing argon of the ladle according to claim 6, characterized in that: the number of the electromagnets I (12), the number of the electromagnets II (13) and the number of the permanent magnets (14) are the same and are even.

8. The automatic butt joint device for the bottom blowing argon of the ladle according to claim 7, characterized in that: the outside argon blowing device be the axisymmetric object, argon gas interface (10) are the axisymmetric object, it is the axisymmetric object to receive bowl mouth (7), the symmetry axis of argon gas interface (10) coincides with the symmetry axis of receiving bowl mouth (7), it is interior cambered surface to receive bowl mouth (7) internal surface shape, it is the sphere to receive bowl mouth top (8) internal surface, receive bowl mouth top (8) and argon gas interface (10) fixed connection, the internal surface of the junction of receiving bowl mouth top (8) and argon gas interface (10) is the face of cylinder.

9. The use method of the automatic butt joint device for the ladle bottom argon blowing according to any one of claims 1 to 8, is characterized in that: the method comprises the following steps: step 1, a current flowing switch of an electromagnet I (12) in the positioning head is turned on, the electromagnet I (12) generates magnetic force, the electromagnet I (12) is attracted with a permanent magnet (14) at an argon interface of a steel ladle, the electromagnet I (12) is attracted into a top part (8) of a receiving bowl opening, the inner surface of the top part (8) of the receiving bowl opening is completely overlapped with the outer surface of the positioning head (2), and the positioning head (2) is positioned right below the argon interface (10);

because inside argon gas pipe connector (1) of location head (2) is connected with tubulose UNICOM pole (4), location head (2) can drive outside argon blowing device and move to receiving bowl mouth top (8) under the department, blow under the self action of gravity of argon device base (5) outside, the axis of hole (11) is perpendicular downwards, the outside gravity that blows the argon device this moment and location head (2) to outside argon blowing device's pulling force size equals, opposite direction, the outside axis of argon blowing device, the axis of location head hole (11), the axis of receiving bowl mouth (7), the axis coincidence of argon gas interface (10) is a line, outside argon blowing device and accurate centering of argon gas interface (10).

Step 2, the current flow direction switch of electromagnet (13) on the base of the external argon blowing device is opened, the external argon blowing device generates magnetic force, the external argon blowing device attracts to the positioning head (2), the external argon blowing device vertically ascends, the argon pipe connector (1) is also vertically ascended, the argon pipe connector (1) is jacked into the argon interface (10), the argon pipe connector (1) is communicated with the argon interface (10), automatic butt joint of the external argon blowing device and the argon interface (10) is realized, the external argon source is opened, and argon blowing at the bottom of the steel ladle starts.

And step 3: after argon blowing at the bottom of the ladle is finished, an external argon gas source is closed, then the current flowing direction in the electromagnet I (12) of the positioning head is changed through a switch, the magnetic pole of the electromagnet I (12) is reversed, the electromagnet I (12) is repelled with a permanent magnet (14) at the argon interface of the ladle, the positioning head (2) is repelled with the external argon blowing device, the electromagnetic repulsion force enables the positioning head (2) to vertically move downwards, the external argon blowing device also vertically moves downwards, the argon gas pipe connector (1) is driven to move downwards, and the external argon blowing device is disconnected from the argon interface (10).

And 4, step 4: and closing a current switch of an electromagnet (12) in the positioning head and a current switch of an electromagnet (13) on a base of the external argon blowing device, and finishing the ladle bottom argon blowing of the molten steel in the furnace.

10. The use method of the automatic butt joint device for the ladle bottom blowing argon according to claim 9 is characterized in that: in the step 1, firstly, an electromagnet I (12) is driven to move under an argon interface (10) through magnetic attraction, meanwhile, under the action of the gravity of an external argon blowing device, a connecting line between the gravity center of the external argon blowing device and the spherical center of a positioning head (2) is in a vertically downward state, the external argon blowing device is in a suspension state, and as the external argon blowing device is an axisymmetric object, the symmetric axis of the external argon blowing device is in a vertical state, an argon pipe connector (1) is also positioned in a vertical state and is positioned under the argon interface (10), so that the external argon blowing device and the argon interface (10) can be accurately centered;

in the steps 2 and 3, the attraction or repulsion state among the positioning head (2), the external argon blowing device and the argon interface (10) can be controlled by controlling the current flow direction of the electromagnet I (12) in the positioning head and the current flow direction of the electromagnet II (13) in the argon blowing device base, so that the automatic butt joint or disconnection of the ladle bottom argon blowing device is realized, the operation process is simple, and the automation degree is high.

Technical Field

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a ladle bottom argon blowing automatic butt joint device and a using method thereof.

Background

During refining in an LF refining furnace in a steelmaking process, a ladle bottom argon blowing process is adopted to stir molten steel or promote floating of inclusions, the ladle bottom argon blowing process is a process of blowing argon gas into molten steel in a ladle through a gas permeable brick at the bottom of the ladle, one end of the gas permeable brick is connected with an argon pipe, and the other end of the gas permeable brick is in contact with the molten steel. Because the ladle is in frequent more position of changing in the steelmaking flow, need to adopt devices such as overhead traveling crane or buggy ladle to remove the ladle, consequently, argon gas pipe in the ladle and outside argon gas source can't keep often connected state, be connected with the argon gas pipe in the ladle at outside argon gas source in the LF refining process, outside argon gas source and the disconnection of argon gas pipe in the ladle after LF refining, at present mostly adopt the manual work to connect or break off with argon gas pipe in outside argon gas source and the ladle, the manual work is connected or the in-process of disconnection with argon gas pipe in outside argon gas source and the ladle, the high temperature environment around the ladle seriously harms the healthy of worker, and there is certain potential safety hazard.

There are reports that an external argon gas source and an argon gas pipe in a ladle are connected by adopting an automatic butt joint mode in the prior art disclosed at present, for example, patent CN 202010638540.8 "automatic argon blowing butt joint device for ladles, argon butt joint device for ladles and argon blowing method for ladles" discloses an automatic argon blowing butt joint device for ladles and argon butt joint method for ladles and argon blowing method for ladles, the device comprises a transmitting device and a receiving device, the transmitting device comprises a transmitter, a transmitting cylinder, a connecting rod, a spring, a first argon gas pipe and a second argon gas pipe, and the receiving device comprises a receiver and a third argon gas pipe; the emitter comprises a spherical connector and a sliding rod, wherein the center of the spherical connector is provided with an argon channel, the emission cylinder comprises a plunger, a first cylinder cavity and a second cylinder cavity, the second argon pipe is communicated with the first cylinder cavity, the spring is connected to the communicating rod, the communicating rod is inserted through the plunger, one end of the communicating rod is connected to the sliding rod and is communicated with the argon channel, and the other end of the communicating rod is communicated with the first argon pipe; the receiver comprises a receiving bowl opening, a connecting pipe and an argon gas pipeline, wherein an inner spherical surface accommodating cavity is arranged in the receiving bowl opening, one end of the argon gas pipeline is communicated with the inner spherical surface accommodating cavity, and the other end of the argon gas pipeline is communicated with a third argon gas pipe. But because receiving arrangement (on the ladle through flange joint) and emitter (emitter's base passes through the bolt fastening on the buggy ladle) are fixed setting, unable removal, and the receiving area who accepts the bowl mouth is limited, if because ladle position deviation leads to "the spherical connector of emitter transmission not within the receiving area of bowl mouth or spherical connector and the axis of receiving the bowl mouth do not coincide", then can't realize ladle argon gas butt joint or butt joint inseparable, delay the normal argon blowing work of ladle refining furnace, although be equipped with spring 4 can the lateral swing emitter, nevertheless more loaded down with trivial details through manual mode adjustment spring, it is not convenient to operate.

The patent 201510742461.0 discloses a magnetic force automatic alignment argon blowing connecting device and a butt joint and separation method thereof, and discloses a magnetic force automatic alignment argon blowing connecting device and a butt joint and separation method thereof, wherein the connecting device comprises a male head assembly and a female head assembly; the male head assembly comprises a big bag fixing block connected with the big bag, a male head and a flexible extension spring connected with the big bag fixing block and the male head, and the air guide pipe penetrates between the big bag fixing block and the male head; the female head assembly comprises a non-magnetic-conduction guide block and a magnetic excitation device, wherein a penetrating argon-conduction guide pipe is arranged on an iron core axis of the magnetic excitation device, and permanent magnetic steel is arranged on the upper portion of an iron core. The magnetic excitation device is excited to attract the male head assembly provided with the spring to approach the iron core part for attraction, the automatic alignment of the big-bag trolley connecting female head and the big-bag connecting male head can be realized through the non-magnetic-conduction guide block within a certain range, and after the male head and the female head are completely aligned, the permanent magnet is adopted for attraction, so that the failure caused by long-time work of the electromagnetic coil is avoided, the use reliability of the automatic connecting device is improved, and the service life of the automatic connecting device is prolonged. However, due to the complex field process conditions, the large ladle is hoisted by a crane, the position of the large ladle cannot be accurately and non-deviated to a specified position, if the position of the ladle deviates, the central axes of the male head assembly and the female head assembly are not coincident, and the butt joint precision can be influenced.

Disclosure of Invention

The invention aims to solve the problems and provides a ladle bottom argon blowing automatic butt joint device and a using method thereof.

In order to solve the above problems, the present invention provides the following technical solutions: the automatic butt joint device for the bottom argon blowing of the steel ladle comprises a transmitter and a receiver, wherein the transmitter comprises a positioning head and an external argon blowing device, and the receiver comprises a receiving bowl opening and an argon interface of the steel ladle; outside argon-blowing device include the argon gas pipe connector, the axis of argon gas pipe connector coincide with the axis of location head, the embedding of argon gas pipe connector inside the location head and with location head sliding connection, the internal surface at the receiving bowl mouth top of receiving bowl mouth suit with the face of location head, the location head can only first half be the hemispheroid, also can all set for the spheroid. The inner surface of the top of the receiving bowl mouth needs to be matched with the surface of the positioning head, preferably, the inner surface of the top of the receiving bowl mouth and the surface of the positioning head are set to be spherical surfaces, the shape of the inner surface of the argon interface is matched with the shape of the outer surface of the argon pipe connector, after the positioning head is controlled to be completely overlapped with the top of the receiving bowl mouth, the argon pipe connector is controlled to be connected with the inner surface of the argon interface, and after an external argon source is opened, argon blowing at the bottom of the steel ladle is started.

The external argon blowing device further comprises: tubulose UNICOM pole, outside argon blowing device base and argon gas pipe, tubulose UNICOM pole with argon gas pipe connector and argon gas pipe intercommunication, tubulose UNICOM pole run through outside argon blowing device base and with outside argon blowing device base fixed connection.

Preferably, the positioning head is a sphere.

Furthermore, the inside of location head bury underground and to have a plurality of electro-magnet one, on the focus's of location head section was crossed to electro-magnet evenly distributed level, crossed location head centre of sphere department and opened the hole that has vertical through, argon pipe connector sets up in the hole. The distance from the first electromagnet to the spherical center of the positioning head is 1/2 the radius of the positioning head.

Furthermore, an annular clamping groove limiting position is processed in the hole.

Furthermore, the inside of outside argon pipe base be buried outside argon pipe base electro-magnet two, electro-magnet two evenly distributed. The distance from the electromagnet II to the central axis of the external argon gas pipe base is equal to the distance from the electromagnet I to the spherical center of the positioning head, so that the position alignment between the electromagnet I and the permanent magnet under the electromagnetic acting force is facilitated, and the electromagnetic acting force between the electromagnet I and the electromagnet II is facilitated to reach the maximum value.

Furthermore, permanent magnets are embedded around the argon interface and are uniformly distributed in the argon interface. The distance from the permanent magnet to the central axis of the argon interface is equal to the distance from the electromagnet I to the spherical center of the positioning head.

Preferably, the first electromagnet, the second electromagnet and the permanent magnet are distributed in a circumferential array, and the circumferential distribution is beneficial to standardizing the positions of the first electromagnet, the second electromagnet and the permanent magnet and generating a regular magnetic field.

Furthermore, the number of the first electromagnets, the second electromagnets and the permanent magnets is the same, for example, 4-8 even numbers are provided.

Furthermore, the argon gas pipe connector is made of copper.

Further, outside argon blowing device be the axisymmetric object, the argon gas interface is the axisymmetric object, receive the bowl mouth and be the axisymmetric object, the symmetry axis of argon gas interface coincides with the symmetry axis of receiving the bowl mouth, it is interior cambered surface to receive bowl mouth internal surface shape, preferred, should receive bowl mouth internal surface shape for gradual change conical surface, it is the sphere to receive bowl mouth top internal surface, receives bowl mouth top and argon gas interface fixed connection, the internal surface of the junction of receiving bowl mouth top and argon gas interface is the face of cylinder.

The use method of the automatic butt joint device capable of blowing argon from the bottom of the ladle comprises the following steps:

step 1, turning on a current flowing switch of an electromagnet I in a positioning head, wherein the electromagnet I generates magnetic force, the electromagnet I is attracted with a permanent magnet at an argon interface of a steel ladle, the electromagnet I is attracted into the top of a receiving bowl opening, the inner surface of the top of the receiving bowl opening is completely coincided with the outer surface of the positioning head, and the positioning head is positioned right below the argon interface at the moment;

because the inside argon gas pipe connector of location head is connected with tubulose UNICOM pole, the location head can drive outside argon blowing device and move to receiving bowl mouthful top under the department, blow under the self action of gravity of argon device base outside, the axis of the hole of location head is perpendicular downwards, the outside gravity that blows the argon device and the pulling force size that the location head blows the argon device to the outside this moment equals with the location head, opposite direction, the outside axis that blows the argon device, the axis of the hole of location head, receive the axis of bowl mouthful, the axis coincidence of argon gas interface is a line, outside argon blowing device and the accurate centering of argon gas interface are blown.

Step 2, opening the current flow direction switch of the electromagnet on the external argon blowing device base, generating magnetic force by the external argon blowing device, attracting the external argon blowing device and the positioning head, vertically ascending the external argon blowing device, vertically ascending the argon pipe connector, jacking the argon pipe connector into the argon interface, communicating the argon pipe connector with the argon interface, realizing automatic butt joint of the external argon blowing device and the argon interface, opening an external argon source, and starting argon blowing at the bottom of the steel ladle.

And step 3: after argon blowing at the bottom of the ladle is finished, an external argon source is closed, then the current flowing direction in the first electromagnet of the positioning head is changed through a switch, the magnetic pole of the first electromagnet is reversed, the first electromagnet is repelled with a permanent magnet at the argon interface of the ladle, the positioning head is repelled with an external argon blowing device, the electromagnetic repulsion force enables the positioning head to vertically move downwards, the external argon blowing device also vertically move downwards, the argon pipe connecting head is connected with the argon pipe connecting head to move downwards, and the external argon blowing device is disconnected from the argon interface.

And 4, step 4: and closing a current switch of the electromagnet I in the positioning head and a current switch of the electromagnet II on the base of the external argon blowing device, and finishing the argon blowing at the bottom of the steel ladle of the molten steel in the furnace.

In this step 1 earlier through magnetic attraction messenger location head move to under the argon gas interface, blow under the argon device self action of gravity outside simultaneously, the outside line of blowing argon device focus and location head centre of sphere is the state of vertically downwards, the outside argon device that blows is the state of suspending in midair, because the outside argon device that blows is the axisymmetric object, consequently the outside argon device symmetry axis that blows is the vertical state, the argon gas coupling also is positioned vertical state and is located the argon gas interface under, can realize the outside accurate centering of blowing argon device and argon gas interface.

In the steps 2 and 3, the attraction or repulsion state among the positioning head, the external argon blowing device and the argon interface can be controlled by controlling the flow direction of the current of the electromagnet I in the positioning head and the flow direction of the current of the electromagnet II in the argon blowing device base, so that the automatic butt joint or disconnection of the ladle bottom argon blowing device is realized, the operation process is simple, and the automation degree is high.

Compared with the prior art, the invention has the beneficial effects that:

1. in the technology, the positioning head is moved to the position under the argon interface through the magnetic force between the positioning head and the argon interface, meanwhile, under the action of the gravity of the external argon blowing device, the external argon blowing device is in a suspension state, the pulling force of the external argon blowing device by the positioning head is equal to the gravity of the external argon blowing device in magnitude and opposite in direction, and because the gravity of the external argon blowing device is vertically downward, the pulling force of the positioning head and the external argon blowing device is vertically upward, namely, the connecting line of the spherical center of the positioning head and the gravity center of the external argon blowing device is vertical, the central axis of the external argon blowing device, the central axis of the hole of the positioning head, the axial line of the receiving bowl mouth and the central axis of the argon interface are all coincided into one line, so that the argon pipe joint can be positioned in a vertical state and positioned under the argon interface, and the accurate centering of the position of the external argon blowing device and the argon interface can be realized, the automatic butt joint precision and the butt joint success rate of the ladle bottom argon blowing are improved.

2. The application in the technique through the flow direction of the two electric currents of electro-magnet in the control positioning head in the electric current and the argon blowing device base in the electric current control positioning head, outside argon blowing device, the attraction or the repulsion state between the argon interface to realize the automatic butt joint or the disconnection of the argon blowing device at the bottom of the ladle, operation process is simple, degree of automation is high, reduces workman intensity of labour.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of an automatic butt joint device for ladle bottom argon blowing provided by the present application;

FIG. 2 is a schematic view of the automatic butt joint device for ladle bottom argon blowing provided by the present application after the butt joint is completed;

FIG. 3 is a schematic cross-sectional view taken at position AA in FIG. 1;

FIG. 4 is a schematic transverse cross-sectional view at the position BB in FIG. 1;

fig. 5 is a schematic cross-sectional view of fig. 1 at the location CC.

Reference numerals: 1. an argon pipe connector; 2. positioning the head; 3. limiting; 4. a tubular communication rod; 5. a base of an external argon blowing device; 6. an argon pipe; 7. receiving a bowl mouth; 8. receiving the top of the bowl mouth; 9. the inner surface of the argon interface; 10. an argon interface; 11. a hole; 12. an electromagnet I; 13. an electromagnet II; 14. and a permanent magnet.

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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1-5

Example one

The invention provides the following technical scheme: the automatic butt joint device for the bottom argon blowing of the steel ladle comprises a transmitter and a receiver, wherein the transmitter comprises a positioning head 2 and an external argon blowing device, and the receiver comprises a receiving bowl opening 7 and an argon interface 10 of the steel ladle; outside argon blowing device include argon gas pipe connector 1, the axis of argon gas pipe connector 1 coincide with the axis of location head 2, the embedding of argon gas pipe connector 1 inside location head 2 and with location head 2 sliding connection, the receiving bowl mouth 7 the receiving bowl mouth top 8 the internal surface suit with the sphere of location head, the shape of argon gas interface internal surface 9 of argon gas interface 10 suit with the shape of argon gas pipe connector 1 surface, after control location head 2 and the complete coincidence of receiving bowl mouth top 8, control argon gas pipe connector 1 is connected with argon gas interface internal surface 9, after opening outside argon gas source, the ladle is blown argon at the bottom and is begun.

The external argon blowing device further comprises: tubulose UNICOM pole 4, outside argon blowing device base 5 and argon gas pipe 6, tubulose UNICOM pole 4 with argon gas pipe connector 1 and the 6 intercommunication of argon gas pipe, tubulose UNICOM pole 4 run through outside argon blowing device base 5 and with outside argon blowing device base 5 fixed connection.

A plurality of electromagnets 12 are embedded in the positioning head 2, the electromagnets 12 are uniformly distributed on a horizontal circumferential section, a vertical through hole 11 is formed in the spherical center of the positioning head 2, and the argon pipe connector 1 is arranged in the hole 11. The distance from the electromagnet I12 to the spherical center of the positioning head is 1/2 radius of the positioning head.

Processing has annular draw-in groove restriction position 3 in the hole 11, as shown in fig. 2, the internal diameter of hole 11 is greater than the diameter that annular draw-in groove restricted position 3, and the diameter that annular draw-in groove restricted position 3 is greater than the diameter of argon gas pipe connector, is provided with cyclic annular stopper on the argon gas pipe connector, and cyclic annular stopper equals with the 3 diameters of annular draw-in groove restriction position, and cyclic annular draw-in groove restriction position 3 can prevent argon gas pipe connector 1 downstream, but argon gas pipe connector 1 can upwards free movement.

An external argon pipe base electromagnet II 13 is embedded in the external argon pipe base 5, and the electromagnet II 13 is uniformly distributed on the circumference. The distance from the second electromagnet to the central axis of the external argon gas pipe base is equal to the distance from the first electromagnet 12 to the spherical center of the positioning head 2.

Permanent magnets 14 are embedded around the argon interface 10, and the permanent magnets 14 are evenly distributed in the argon interface 10 in the circumference. The distance from the permanent magnet 14 to the central axis of the argon interface 10 is equal to the distance from the electromagnet I12 to the spherical center of the positioning head 2.

The quantity of the first electromagnets, the second electromagnets and the permanent magnets is the same, for example, 4-8 even-numbered electromagnets are arranged.

The argon gas pipe connector 1 is made of copper.

The outside argon blowing device is the axisymmetric object, and the argon gas interface is the axisymmetric object, and it is the axisymmetric object to receive bowl mouth 7, and the symmetry axis of argon gas interface coincides with the symmetry axis of receiving the bowl mouth, and it is interior cambered surface to receive 7 internal surface shapes of bowl mouth, and it is the sphere to receive bowl mouth top internal surface, receives bowl mouth top and argon gas interface fixed connection, and the internal surface of the junction of receiving bowl mouth top and argon gas interface is the face of cylinder.

The use method of the automatic butt joint device capable of blowing argon from the bottom of the ladle comprises the following steps:

step 1, a current flowing switch of an electromagnet 12 in a positioning head is turned on, the positioning head 12 generates magnetic force, the electromagnet 12 is attracted with a permanent magnet 14 at an argon interface of a ladle, the electromagnet 12 is attracted into a receiving bowl opening top 8, the inner surface of the receiving bowl opening top 8 is completely overlapped with the outer surface of the positioning head 2, and the positioning head 2 is located right below the argon interface 10;

because the inside argon gas pipe connector 1 of location head 2 is connected with tubulose UNICOM pole 4, location head 2 can drive outside argon blowing device and move to receiving bowl mouth top 8 department under, outside argon blowing device base 5's self action of gravity down, the axis of hole 11 is perpendicular downwards, outside the argon blowing device gravity that receives and location head 2 this moment blow the pulling force size of argon blowing device to the outside equal, opposite direction, the outside axis of argon blowing device, the axis of location head hole 11, receive the axis of bowl mouth 7, the axis coincidence of argon gas interface 10 is a line, outside argon blowing device and the accurate centering of argon gas interface 10.

Step 2, the current flow direction switch of the electromagnet 13 on the base of the external argon blowing device is opened, the external argon blowing device generates magnetic force, the external argon blowing device attracts to the positioning head 2, the external argon blowing device vertically rises, the argon pipe connector 1 is also vertically raised together, the argon pipe connector 1 is jacked into the argon interface 10, the argon pipe connector 1 is communicated with the argon interface 10, automatic butt joint of the external argon blowing device and the argon interface 10 is achieved, an external argon gas source is opened, and argon blowing at the bottom of the steel ladle starts.

And step 3: after argon blowing at the bottom of the ladle is finished, an external argon gas source is closed, then the current flowing direction in the first positioning head electromagnet 12 is changed through a switch, the magnetic pole of the first positioning head electromagnet 12 is reversed, the first positioning head electromagnet 12 is repelled with the permanent magnet 14 at the argon interface of the ladle, the positioning head 2 is repelled with the external argon blowing device, the electromagnetic repulsion force enables the positioning head 2 to vertically move downwards, the external argon blowing device also vertically moves downwards, the argon pipe connector 1 is driven to move downwards, and the external argon blowing device is disconnected from the argon interface 10.

And 4, step 4: and closing a current switch of the electromagnet I12 in the positioning head and a current switch of the electromagnet II 13 on the base of the external argon blowing device, and finishing the argon blowing at the bottom of the steel ladle of the molten steel in the furnace.

In the step 1, firstly, an electromagnet I12 is driven to run under an argon interface 10 through magnetic attraction, meanwhile, under the action of the gravity of an external argon blowing device, the connecting line of the gravity center of the external argon blowing device and the sphere center of a positioning head 2 is in a vertically downward state, the external argon blowing device is in a suspension state, the external argon blowing device comprises the positioning head, a tubular communication rod, an external argon blowing device base and an argon pipe, when the magnetic force is not applied, the state is that the external argon blowing device base is positioned on a buggy ladle (but not fixedly connected with the buggy ladle), the tubular communication rod is positioned on the central axis of the external argon blowing device base, the positioning head is positioned right above the external argon blowing device base, the tubular communication rod plays a role in connecting the positioning head and supporting the positioning head to be positioned right above the external argon blowing device base, and the argon pipe plays a role in communicating with an external argon source. After applying magnetic force, the location head produces magnetic force, the location head attracts mutually with the permanent magnet of the argon gas kneck of ladle, magnetic force between location head and the argon gas interface makes the location head move under the argon gas interface, the location head drives outside argon blowing device and moves under the argon gas interface this moment, it leaves the buggy ladle to drive outside argon blowing device base still, simultaneously under outside argon blowing device self action of gravity, outside argon blowing device is for hanging in midair the state, because outside argon blowing device is the axisymmetric object, consequently outside argon blowing device symmetry axis is the vertical state, argon pipe joint 1 also is positioned the vertical state and is located argon gas interface 10 under, can realize the accurate centering of outside argon blowing device and argon gas interface.

In the steps 2 and 3, the attraction or repulsion state among the positioning head 2, the external argon blowing device and the argon interface 10 can be controlled by controlling the current flow direction of the first electromagnet 12 in the positioning head and the current flow direction of the second electromagnet 13 in the argon blowing device base, so that the automatic butt joint or disconnection of the ladle bottom argon blowing device is realized, the operation process is simple, and the automation degree is high.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.