An automatic butt-joint device for bottom argon blowing of ladle and its usage method

Abstract

The present invention relates to the technical field of iron and steel metallurgy, and specifically relates to a ladle bottom argon blowing automatic docking device and a using method thereof. The device includes a transmitter and a receiver. The transmitter includes a positioning head and an external argon blowing device. The receiver includes a receiving bowl mouth and an argon gas interface of the ladle. The external argon blowing device includes an argon gas pipe connector. The axis of the argon gas pipe connector coincides with the central axis of the positioning head. The argon gas pipe connector is embedded inside the positioning head and is slidably connected to the positioning head. The inner surface of the top of the receiving bowl mouth of the receiving bowl mouth is adapted to the surface of the positioning head. The shape of the inner surface of the argon gas interface of the argon gas interface is adapted to the shape of the outer surface of the argon gas pipe connector. After controlling the positioning head to completely coincide with the top of the receiving bowl mouth through an electromagnet, the connection between the argon gas pipe connector and the inner surface of the argon gas interface is controlled, improving the automatic docking accuracy and docking success rate of the ladle bottom argon blowing, with a simple operation process, high automation degree, and reduced labor intensity of workers.

Description

Technical Field

[0001] The present invention belongs to the technical field of iron and steel metallurgy. Specifically, the present invention relates to a ladle bottom argon blowing automatic docking device and a using method thereof. Background Art

[0002] During the refining process of the LF refining furnace in the steelmaking process, the ladle bottom argon blowing process is required to stir the molten steel or promote the floating of inclusions. The ladle bottom argon blowing process is a process of blowing argon gas into the molten steel in the ladle through a porous plug at the bottom of the ladle. One end of the porous plug is connected to an argon pipe, and the other end is in contact with the molten steel. Since the ladle frequently changes its position in the steelmaking process, devices such as a crane or a ladle car are required to move the ladle. Therefore, the argon pipe in the ladle and the external argon gas source cannot maintain a constant connection state. During the LF refining process, the external argon gas source is connected to the argon pipe in the ladle, and after the LF refining is completed, the external argon gas source is disconnected from the argon pipe in the ladle. Currently, it is mostly manual to connect or disconnect the external argon gas source and the argon pipe in the ladle. During the process of manually connecting or disconnecting the external argon gas source and the argon pipe in the ladle, the high-temperature environment around the ladle seriously endangers the physical health of workers and has certain potential safety hazards.

[0003] There are reports in the currently disclosed prior art on connecting an external argon gas source and the argon gas pipe in a ladle by means of automatic docking. For example, the disclosed patent CN 202010638540.8, "Ladle Automatic Argon Blowing Docking Device and Ladle Argon Gas Docking and Ladle Argon Blowing Method", discloses a ladle automatic argon blowing docking device and a ladle argon gas docking and ladle argon blowing method. The device includes a transmitting device and a receiving device. The transmitting device includes a transmitter, a transmitting cylinder, a connecting rod, a spring, a first argon gas pipe, and a second argon gas pipe. The receiving device includes a receiver and a third argon gas pipe. The transmitter includes a spherical connector with an argon gas channel in the center and a sliding rod. The transmitting cylinder includes a plunger, a first cylinder chamber, and a second cylinder chamber. The second argon gas pipe is connected to the first cylinder chamber. The spring is connected to the connecting rod. The connecting rod is inserted through the plunger, with one end connected to the sliding rod and communicating with the argon gas channel, and the other end communicating with the first argon gas pipe. The receiver includes a receiving bowl mouth, a connecting pipe, and an argon gas pipeline. An inner spherical surface accommodating cavity is provided in the receiving bowl mouth. One end of the argon gas pipeline is connected to the inner spherical surface accommodating cavity, and the other end is connected to the third argon gas pipe. This invention realizes the double gas, double connection, and double control of ladle argon gas automatic docking and ladle ventilation and argon blowing. However, since both the receiving device (connected to the ladle by a flange) and the transmitting device (the base of the transmitting device is fixed to the ladle car by bolts) are fixedly arranged and cannot move, and the receiving area of the receiving bowl mouth is limited. If the "spherical connector emitted by the transmitting device is not within the receiving area of the bowl mouth or the spherical connector does not coincide with the central axis of the receiving bowl mouth" due to the position deviation of the ladle, then the ladle argon gas docking cannot be achieved or the docking is not tight, delaying the normal argon blowing operation of the ladle refining furnace. Although a spring 4 is provided to swing the transmitting device laterally, it is rather cumbersome to adjust the spring manually and the operation is not convenient.

[0004] The disclosed patent 201510742461.0, "A Magnetic Force Automatic Alignment Argon Blowing Connection Device and Its Docking and Separation Method", discloses a magnetic force automatic alignment argon blowing connection device and its docking and separation method. The connection device includes a male head assembly and a female head assembly. The male head assembly includes a ladle fixing block connected to the ladle, a male head, and a flexible tension spring connecting the ladle fixing block and the male head. An air duct penetrates between the ladle fixing block and the male head. The female head assembly includes a non-magnetic guiding block and a magnetic force excitation device. A through argon conduit is provided on the axis of the iron core of the magnetic force excitation device, and a permanent magnet is provided on the upper part of the iron core. In the present invention, by exciting the magnetic force excitation device, the male head assembly provided with a spring is attracted to approach and engage with the iron core part. Within a certain range, the automatic alignment of the ladle car connecting the female head and the ladle connecting the male head can be realized through the non-magnetic guiding block. After the male head and the female head are completely aligned, a permanent magnet is used for attraction, avoiding the failure caused by the long-term operation of the electromagnetic coil, and increasing the reliability and service life of the automatic connection device. However, due to the complex on-site process conditions, the ladles are all lifted by a crane, and it is impossible to ensure that the ladles are accurately positioned without deviation to the specified position. If the position of the ladle is deviated, the central axes of the male head assembly and the female head assembly may not coincide, which will affect the docking accuracy. Summary of the Invention

[0005] The object of the present invention is to address the above-mentioned problems. For the above problems, the present invention provides a bottom blowing argon automatic docking device for a ladle and its usage method. The device includes a positioning head, which can position an external argon blowing device at the argon interface position of the ladle and achieve the coincidence of the central axes of the argon interface and the external argon blowing device, thereby improving the docking accuracy.

[0006] To solve the above problems, the present invention provides the following technical solution: A bottom blowing argon automatic docking device for a ladle includes a transmitter and a receiver. The transmitter includes a positioning head and an external argon blowing device. The receiver includes a receiving bowl mouth and the argon interface of the ladle. The external argon blowing device includes an argon pipe connector. The axis of the argon pipe connector coincides with the central axis of the positioning head. The argon pipe connector is embedded inside the positioning head and is slidably connected to the positioning head. The inner surface of the top of the receiving bowl mouth of the receiving bowl mouth is adapted to the surface of the positioning head. The positioning head can have a hemispherical upper half or be entirely set as a sphere.

[0007] The inner surface of the top of the receiving bowl mouth needs to be adapted to 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 as spherical surfaces. The shape of the inner surface of the argon interface of the argon interface is adapted to the shape of the outer surface of the argon pipe connector. After controlling the complete coincidence of the positioning head and the top of the receiving bowl mouth, control the connection between the argon pipe connector and the inner surface of the argon interface. After opening the external argon gas source, the bottom blowing argon of the ladle starts.

[0008] The described external argon blowing device further includes: a tubular connecting rod, a base of the external argon blowing device, and an argon gas pipe. The tubular connecting rod connects the argon gas pipe connector and the argon gas pipe, and the tubular connecting rod penetrates through the base of the external argon blowing device and is fixedly connected to the base of the external argon blowing device.

[0009] Preferably, the positioning head is a sphere.

[0010] Furthermore, several electromagnets I are embedded inside the positioning head. The electromagnets I are evenly distributed on the cross-section that horizontally passes through the center of gravity of the positioning head. A vertically penetrating hole is opened at the center of the sphere of the positioning head, and the argon gas pipe connector is arranged inside the hole. The distance from the electromagnet I to the center of the sphere of the positioning head is 1 / 2 of the radius of the positioning head.

[0011] Furthermore, an annular clamping groove limiting position is machined inside the hole.

[0012] Furthermore, electromagnets II are buried inside the base of the external argon blowing device, and the electromagnets II are 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 center of the sphere of the positioning head, which is beneficial to the position alignment between the electromagnet I and the permanent magnet under the electromagnetic force, and is beneficial to the electromagnetic force between the electromagnet I and the electromagnet II reaching the maximum value.

[0013] Furthermore, permanent magnets are buried around the argon gas interface, and the permanent magnets are evenly distributed inside the argon gas interface. The distance from the permanent magnet to the central axis of the argon gas interface is equal to the distance from the electromagnet I to the center of the sphere of the positioning head.

[0014] Preferably, the electromagnets I, the electromagnets II, and the permanent magnets are all distributed in a circumferential array. The circumferential distribution is beneficial to standardizing the positions of the electromagnets I, the electromagnets II, and the permanent magnets, and is beneficial to generating a regular magnetic field.

[0015] Furthermore, the number of the electromagnets I, the electromagnets II, and the permanent magnets is the same, for example, 4 - 8 are set and an even number is taken.

[0016] Furthermore, the material of the argon gas pipe connector is copper.

[0017] Furthermore, the external argon blowing device is an axisymmetric object, the argon gas interface is an axisymmetric object, the receiving bowl opening is an axisymmetric object, the axis of symmetry of the argon gas interface coincides with the axis of symmetry of the receiving bowl opening, the inner surface shape of the receiving bowl opening is an inner arc surface. Preferably, the inner surface shape of the receiving bowl opening is a gradually changing inner conical surface, the inner surface at the top of the receiving bowl opening is a spherical surface, the top of the receiving bowl opening is fixedly connected to the argon gas interface, and the inner surface at the connection between the top of the receiving bowl opening and the argon gas interface is a cylindrical surface.

[0018] A method for using an automatic butt - joint device for bottom argon blowing in a ladle includes the following steps:

[0019] Step 1: Turn on the current flow switch of Electromagnet 1 in the positioning head. Electromagnet 1 generates magnetic force, and it attracts the permanent magnet at the argon interface of the ladle. Electromagnet 1 is attracted to the top of the receiving bowl opening, and the inner surface of the top of the receiving bowl opening completely coincides with the outer surface of the positioning head. At this time, the positioning head is directly below the argon interface.

[0020] Since the argon pipe connector inside the positioning head is connected to the tubular connecting rod, the positioning head will drive the external argon blowing device to move to directly below the top of the receiving bowl opening. Under the action of the self - gravity of the base of the external argon blowing device, the central axis of the hole of the positioning head is vertically downward. At this time, the gravity of the external argon blowing device and the pulling force of the positioning head on the external argon blowing device are equal in magnitude and opposite in direction. The central axis of the external argon blowing device, the central axis of the hole of the positioning head, the central axis of the receiving bowl opening, and the central axis of the argon interface coincide as a straight line, achieving precise alignment between the external argon blowing device and the argon interface.

[0021] Step 2: Turn on the current flow switch of Electromagnet 2 on the base of the external argon blowing device. The external argon blowing device generates magnetic force, and the external argon blowing device attracts the positioning head. The external argon blowing device rises vertically, and the argon pipe connector is also driven to rise vertically. The argon pipe connector is pushed into the argon interface, and the argon pipe connector is connected and communicated with the argon interface, realizing the automatic docking of the external argon blowing device and the argon interface. Turn on the external argon gas source, and bottom argon blowing of the ladle starts.

[0022] Step 3: After the bottom argon blowing of the ladle ends, turn off the external argon gas source, and then change the current flow direction in Electromagnet 1 of the positioning head through the switch, causing the magnetic pole of Electromagnet 1 to reverse. Electromagnet 1 repels the permanent magnet at the argon interface of the ladle, and the positioning head also repels the external argon blowing device. The electromagnetic repulsion force causes the positioning head to move vertically downward and the external argon blowing device to also move vertically downward. The argon pipe connector is driven to move downward, and the connection between the external argon blowing device and the argon interface is disconnected.

[0023] Step 4: Turn off the current switch of Electromagnet 1 in the positioning head and the current switch of Electromagnet 2 on the base of the external argon blowing device, and the bottom argon blowing of the ladle for this heat of molten steel ends.

[0024] In this Step 1, first, the positioning head is operated to directly below the argon interface by magnetic attraction. At the same time, under the action of the self - gravity of the external argon blowing device, the line connecting the center of gravity of the external argon blowing device and the center of the positioning head is in a vertically downward state, and the external argon blowing device is in a suspended state. Since the external argon blowing device is an axisymmetric object, the axis of symmetry of the external argon blowing device is in a vertical state, and the argon pipe connector is also positioned in a vertical state and directly below the argon interface, enabling precise alignment between the external argon blowing device and the argon interface.

[0025] In steps 2 and 3, by controlling the current flow directions of electromagnet 1 in the positioning head and electromagnet 2 in the base of the argon blowing device, the attraction or repulsion states among the positioning head, the external argon blowing device, and the argon gas interface can be controlled, thereby realizing the automatic docking or disconnection of the ladle bottom argon blowing device. The operation process is simple and the degree of automation is high.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. In the technology described in this application, first, the positioning head is moved to directly below the argon gas interface by the magnetic force between the positioning head and the argon gas interface. At the same time, under the action of its own gravity, the external argon blowing device is in a suspended state. The pulling force of the positioning head on the external argon blowing device is equal in magnitude and opposite in direction to the gravity of the external argon blowing device. Since the gravity of the external argon blowing device is in the vertically downward direction, the pulling force between the positioning head and the external argon blowing device is in the vertically upward direction, that is, the line connecting the center of the positioning head and the center of gravity of the external argon blowing device is in a vertical state. The central axis of the external argon blowing device, the central axis of the hole in the positioning head, the axial line of the receiving bowl opening, and the central axis of the argon gas interface all coincide to form a single line. Thus, the argon gas pipe connector can also be positioned in a vertical state and directly below the argon gas interface, enabling the precise alignment of the positions of the external argon blowing device and the argon gas interface, and improving the automatic docking accuracy and success rate of the ladle bottom argon blowing.

[0028] 2. In the technology described in this application, by controlling the current flow directions of electromagnet 1 in the positioning head and electromagnet 2 in the base of the argon blowing device, the attraction or repulsion states among the positioning head, the external argon blowing device, and the argon gas interface can be controlled, thereby realizing the automatic docking or disconnection of the ladle bottom argon blowing device. The operation process is simple, the degree of automation is high, and the labor intensity of workers is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Schematic diagram of an automatic docking device for ladle bottom argon blowing provided by this application;

[0031] Figure 2 Schematic diagram of the automatic docking device for ladle bottom argon blowing provided by this application after docking is completed;

[0032] Figure 3 For Figure 1 Transverse sectional schematic diagram at position AA;

[0033] Figure 4 For Figure 1 The schematic diagram of the transverse section at the BB position in

[0034] Figure 5 For Figure 1 The schematic diagram of the transverse section at the CC position in

[0035] Reference numerals: 1, argon pipe connector; 2, positioning head; 3, annular groove limiting position; 4, tubular connecting rod; 5, base of external argon blowing device; 6, argon pipe; 7, receiving bowl mouth; 8, top of receiving bowl mouth; 9, inner surface of argon gas interface; 10, argon gas interface; 11, hole; 12, electromagnet 1; 13, electromagnet 2; 14, permanent magnet. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] Such as Figures 1-5

[0039] Embodiment 1

[0040] The present invention provides the following technical solutions: A ladle bottom argon blowing automatic docking device includes a transmitter and a receiver. The transmitter includes a positioning head 2 and an external argon blowing device. The receiver includes a receiving bowl mouth 7 and an argon gas interface 10 of the ladle. The external argon blowing device includes an argon pipe connector 1. The axis of the argon pipe connector 1 coincides with the central axis of the positioning head 2. The argon pipe connector 1 is embedded inside the positioning head 2 and is slidably connected to the positioning head 2. The inner surface of the top 8 of the receiving bowl mouth 7 of the receiving bowl mouth is adapted to the spherical surface of the positioning head. The shape of the inner surface 9 of the argon gas interface 10 of the argon gas interface is adapted to the shape of the outer surface of the argon pipe connector 1. After controlling the positioning head 2 to completely coincide with the top 8 of the receiving bowl mouth, control the argon pipe connector 1 to be connected to the inner surface 9 of the argon gas interface. After opening the external argon gas source, the ladle bottom argon blowing starts.

[0041] The described external argon blowing device further includes: a tubular connecting rod 4, an external argon blowing device base 5, and an argon gas pipe 6. The tubular connecting rod 4 connects the argon gas pipe connector 1 and the argon gas pipe 6, and the tubular connecting rod 4 penetrates through the external argon blowing device base 5 and is fixedly connected to the external argon blowing device base 5.

[0042] Inside the positioning head 2, several first electromagnets 12 are embedded. The first electromagnets 12 are evenly distributed on the horizontal circumferential section. A vertically penetrating hole 11 is opened at the center of the positioning head 2, and the argon gas pipe connector 1 is arranged inside the hole 11. The distance from the first electromagnet 12 to the center of the positioning head is 1 / 2 of the radius of the positioning head.

[0043] A ring-shaped slot limiting position 3 is machined in the hole 11. As Figure 2 shown, the inner diameter of the hole 11 is larger than the diameter of the ring-shaped slot limiting position 3, the diameter of the ring-shaped slot limiting position 3 is larger than the diameter of the argon gas pipe connector, a ring-shaped limiting block is arranged on the argon gas pipe connector, the diameter of the ring-shaped limiting block is equal to the diameter of the ring-shaped slot limiting position 3, and the ring-shaped slot limiting position 3 can prevent the argon gas pipe connector 1 from moving downward, but the argon gas pipe connector 1 can move upward freely.

[0044] Inside the external argon blowing device base 5, second electromagnets 13 are embedded. The second electromagnets 13 are evenly distributed in a circle. The distance from the second electromagnet 13 to the central axis of the external argon blowing device base 5 is equal to the distance from the first electromagnet 12 to the center of the positioning head 2.

[0045] Around the argon gas interface 10, permanent magnets 14 are embedded. The permanent magnets 14 are evenly distributed in a circle inside the argon gas interface 10. The distance from the permanent magnet 14 to the central axis of the argon gas interface 10 is equal to the distance from the first electromagnet 12 to the center of the positioning head 2.

[0046] The number of the first electromagnets 12, the second electromagnets 13, and the permanent magnets 14 is the same, for example, 4 to 8 are set and an even number is taken.

[0047] The argon gas pipe connector 1 is made of copper.

[0048] The external argon blowing device is an axisymmetric object, the argon gas interface is an axisymmetric object, the receiving bowl mouth 7 is an axisymmetric object, the axis of symmetry of the argon gas interface coincides with the axis of symmetry of the receiving bowl mouth, the inner surface shape of the receiving bowl mouth 7 is an inner arc surface, the inner surface at the top of the receiving bowl mouth is a spherical surface, the top of the receiving bowl mouth is fixedly connected to the argon gas interface, and the inner surface at the connection between the top of the receiving bowl mouth and the argon gas interface is a cylindrical surface.

[0049] A method for using an automatic butt-joint device for bottom argon blowing in a ladle includes the following steps:

[0050] Step 1: Turn on the current flow switch of the electromagnet 12 in the positioning head. The positioning head 2 generates magnetic force, and the electromagnet 12 is attracted to the permanent magnet 14 at the argon interface of the ladle. The electromagnet 12 is attracted to the top 8 of the receiving bowl. The inner surface of the top 8 of the receiving bowl completely coincides with the outer surface of the positioning head 2. At this time, the positioning head 2 is directly below the argon interface 10.

[0051] Since the argon pipe connector 1 inside the positioning head 2 is connected to the tubular connecting rod 4, the positioning head 2 will drive the external argon blowing device to move to directly below the top 8 of the receiving bowl. Under the action of the self-gravity of the base 5 of the external argon blowing device, the central axis of the hole 11 is vertically downward. At this time, the gravity of the external argon blowing device and the pulling force of the positioning head 2 on the external argon blowing device are equal in magnitude and opposite in direction. The central axis of the external argon blowing device, the central axis of the positioning head hole 11, the central axis of the receiving bowl 7, and the central axis of the argon interface 10 coincide as a straight line, and the external argon blowing device and the argon interface 10 are accurately centered.

[0052] Step 2: Turn on the current flow switch of the electromagnet 13 on the base 5 of the external argon blowing device. The external argon blowing device generates magnetic force, and the external argon blowing device is attracted to the positioning head 2. The external argon blowing device rises vertically, and the argon pipe connector 1 is also driven to rise vertically. The argon pipe connector 1 is pushed into the argon interface 10, and the argon pipe connector 1 is connected to the argon interface 10 to achieve the automatic docking of the external argon blowing device and the argon interface 10. Turn on the external argon gas source, and the bottom argon blowing of the ladle starts.

[0053] Step 3: After the bottom argon blowing of the ladle ends, turn off the external argon gas source, and then change the current flow direction in the electromagnet 12 of the positioning head through the switch to reverse the magnetic pole of the electromagnet 12 of the positioning head. The electromagnet 12 of the positioning head repels the permanent magnet 14 at the argon interface of the ladle, and the positioning head 2 also repels the external argon blowing device. The electromagnetic repulsive force causes the positioning head 2 to move vertically downward and the external argon blowing device to also move vertically downward. The argon pipe connector 1 is driven to move downward, and the connection between the external argon blowing device and the argon interface 10 is disconnected.

[0054] Step 4: Turn off the current switch of the electromagnet 12 in the positioning head and the current switch of the electromagnet 13 on the base of the external argon blowing device, and the bottom argon blowing of the ladle for this heat of molten steel ends.

[0055] In this step 1, first, the electromagnet 12 is operated to directly below the argon interface 10 by magnetic attraction. At the same time, under the action of the self-gravity of the external argon blowing device, the line connecting the center of gravity of the external argon blowing device and the center of the positioning head 2 is in a vertically downward state, and the external argon blowing device is in a suspended state. The external argon blowing device consists of a positioning head, a tubular connecting rod, the base of the external argon blowing device, and an argon pipe. When no magnetic force is applied, its state is that "the base of the external argon blowing device is on the ladle car (but not fixedly connected to the ladle car), the tubular connecting rod is on the central axis of the base of the external argon blowing device, and the positioning head is directly above the base of the external argon blowing device". The tubular connecting rod serves to connect the positioning head and support the positioning head directly above the base of the external argon blowing device, and the argon pipe serves to connect to the external argon gas source. After the magnetic force is applied, the positioning head generates a magnetic force, and the positioning head attracts the permanent magnet at the argon interface of the ladle. Through the magnetic force between the positioning head and the argon interface, the positioning head is operated to directly below the argon interface. At this time, the positioning head drives the external argon blowing device to directly below the argon interface, and also drives the base of the external argon blowing device away from the ladle car. At the same time, under the action of the self-gravity of the external argon blowing device, the external argon blowing device is in a suspended state. Since the external argon blowing device is an axisymmetric object, the axis of symmetry of the external argon blowing device is in a vertical state, and the argon pipe connector 1 is also positioned in a vertical state and directly below the argon interface 10, enabling precise alignment of the external argon blowing device and the argon interface.

[0056] In steps 2 and 3, by controlling the current flow direction of the electromagnet 12 in the positioning head and the current flow direction of the electromagnet 13 in the base of the argon blowing device, the attraction or repulsion state among the positioning head 2, the external argon blowing device, and the argon interface 10 can be controlled, thereby realizing the automatic docking or disconnection of the bottom argon blowing device of the ladle. The operation process is simple and the degree of automation is high.

[0057] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An automatic butt-joint device for bottom argon blowing of a ladle, characterized in that: It includes a transmitter and a receiver. The transmitter includes a positioning head (2) and an external argon blowing device, and the receiver includes a receiving bowl mouth (7) and an argon interface (10) of the ladle; the external argon blowing device includes an argon pipe connector (1), the axis of the argon pipe connector (1) coincides with the central axis of the positioning head (2), the argon pipe connector (1) is embedded inside the positioning head (2) and is slidably connected to the positioning head (2), the inner surface of the receiving bowl mouth top (8) of the receiving bowl mouth (7) is adapted to the top surface of the positioning head (2), the shape of the inner surface (9) of the argon interface of the argon interface (10) is adapted to the shape of the outer surface of the argon pipe connector (1). After controlling the positioning head (2) to completely coincide with the receiving bowl mouth top (8), control the argon pipe connector (1) to be connected to the inner surface (9) of the argon interface. The external argon blowing device further includes: a tubular connecting rod (4), an external argon blowing device base (5) and an argon pipe (6). The tubular connecting rod (4) connects the argon pipe connector (1) and the argon pipe (6), the tubular connecting rod (4) penetrates through the external argon blowing device base (5) and is fixedly connected to the external argon blowing device base (5). The positioning head (2) is a sphere, and a number of electromagnets one (12) are buried inside the positioning head (2). The electromagnets one (12) are evenly distributed on the transverse section passing through the center of gravity of the positioning head (2). A vertically penetrating hole (11) is opened at the center of the sphere of the positioning head (2). The argon pipe connector (1) is arranged inside the hole (11). A ring-shaped card slot limiting position (3) is machined inside the hole (11). An electromagnet two (13) is buried inside the external argon blowing device base (5), and the electromagnets two (13) are evenly distributed. Permanent magnets (14) are buried around the argon interface (10), and the permanent magnets (14) are evenly distributed inside the argon interface (10). The inner diameter of the hole (11) is larger than the diameter of the ring-shaped card slot limiting position (3), the diameter of the ring-shaped card slot limiting position (3) is larger than the diameter of the argon pipe connector (1). A ring-shaped limiting block is arranged on the argon pipe connector (1), and the diameter of the ring-shaped limiting block is equal to the diameter of the ring-shaped card slot limiting position (3). The ring-shaped card slot limiting position (3) can prevent the argon pipe connector (1) from moving downward, and the argon pipe connector (1) can move upward freely.

2. The automatic butt-joint device for bottom argon blowing of ladle according to claim 1, wherein: The distance from the electromagnet one (12) to the center of the sphere of the positioning head is 1 / 2 of the radius of the positioning head. The distance from the electromagnet two (13) to the central axis of the external argon blowing device base (5) is equal to the distance from the electromagnet one (12) to the center of the sphere of the positioning head (2). The distance from the permanent magnet (14) to the central axis of the argon interface (10) is equal to the distance from the electromagnet one (12) to the center of the sphere of the positioning head (2).

3. The automatic butt-joint device for bottom argon blowing of ladle according to claim 2, wherein: The number of the electromagnets one (12), the electromagnets two (13) and the permanent magnets (14) is the same and is an even number.

4. The automatic butt-joint device for bottom argon blowing of ladle according to claim 3, characterized in that: The described external argon blowing device is an axisymmetric object, the argon gas interface (10) is an axisymmetric object, the receiving bowl opening (7) is an axisymmetric object, the axis of symmetry of the argon gas interface (10) coincides with the axis of symmetry of the receiving bowl opening (7), the inner surface shape of the receiving bowl opening (7) is an inner arc surface, the inner surface of the top (8) of the receiving bowl is a spherical surface, the top (8) of the receiving bowl is fixedly connected to the argon gas interface (10), and the inner surface at the connection between the top (8) of the receiving bowl and the argon gas interface (10) is a cylindrical surface.

5. The usage method of a ladle bottom argon blowing automatic docking device according to claim 4, characterized in that: It includes the following steps: Step 1: Turn on the current flow switch of the electromagnet one (12) in the positioning head (2). The electromagnet one (12) generates a magnetic force. The electromagnet one (12) attracts the permanent magnet (14) at the argon gas interface of the ladle. The electromagnet one (12) is attracted into the top (8) of the receiving bowl. The inner surface of the top (8) of the receiving bowl completely coincides with the outer surface of the positioning head (2). At this time, the positioning head (2) is directly below the argon gas interface (10). Since the argon gas pipe connector (1) inside the positioning head (2) is connected to the tubular connecting rod (4), the positioning head (2) will drive the external argon blowing device to move to a position directly below the top (8) of the receiving bowl. Under the action of the self-gravity of the base (5) of the external argon blowing device, the central axis of the hole (11) is vertically downward. At this time, the gravity of the external argon blowing device and the pulling force of the positioning head (2) on the external argon blowing device are equal in magnitude and opposite in direction. The central axis of the external argon blowing device, the central axis of the positioning head hole (11), the central axis of the receiving bowl (7), and the central axis of the argon gas interface (10) coincide as a straight line, and the external argon blowing device and the argon gas interface (10) are accurately centered. Step 2: Turn on the current flow switch of the electromagnet two (13) on the base (5) of the external argon blowing device. The external argon blowing device generates a magnetic force. The external argon blowing device attracts the positioning head (2). The external argon blowing device rises vertically, and the argon gas pipe connector (1) is also driven to rise vertically. The argon gas pipe connector (1) is pushed into the argon gas interface (10). The argon gas pipe connector (1) is connected to the argon gas interface (10) to achieve the automatic docking of the external argon blowing device and the argon gas interface (10). Turn on the external argon gas source, and bottom argon blowing of the ladle starts. Step 3: After the bottom argon blowing of the ladle ends, turn off the external argon gas source, and then change the current flow direction in the electromagnet one (12) of the positioning head (2) through the switch to reverse the magnetic pole of the electromagnet one (12). The electromagnet one (12) repels the permanent magnet (14) at the argon gas interface of the ladle, and the positioning head (2) also repels the external argon blowing device. The electromagnetic repulsive force makes the positioning head (2) move vertically downward and the external argon blowing device also move vertically downward. The argon gas pipe connector (1) is driven to move downward, and the connection between the external argon blowing device and the argon gas interface (10) is disconnected. Step 4: Turn off the current switch of the electromagnet one (12) in the positioning head (2) and the current switch of the electromagnet two (13) on the base (5) of the external argon blowing device. The bottom argon blowing of the ladle ends.

6. The usage method of a ladle bottom argon blowing automatic docking device according to claim 5, characterized in that: In this step 1, first, the electromagnet 1 (12) is made to move to directly below the argon gas interface (10) by magnetic attraction. At the same time, under the action of the self-gravity of the external argon gas blowing device, the line connecting the center of gravity of the external argon gas blowing device and the center of the positioning head (2) is in a vertically downward state, and the external argon gas blowing device is in a suspended state. Since the external argon gas blowing device is an axisymmetric object, the axis of symmetry of the external argon gas blowing device is in a vertical state, and the argon gas pipe connector (1) is also positioned in a vertical state and directly below the argon gas interface (10), enabling precise alignment between the external argon gas blowing device and the argon gas interface (10). In steps 2 and 3, by controlling the current flow directions of the electromagnet 1 (12) in the positioning head (2) and the electromagnet 2 (13) in the base (5) of the external argon gas blowing device, the attraction or repulsion states among the positioning head (2), the external argon gas blowing device, and the argon gas interface (10) can be controlled.

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