JP2937804B2 - Lower nozzle removal device for molten metal storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing a lower nozzle of a molten metal container, and more particularly, to a tundish and a ladle (hereinafter referred to as a molten metal container) of a continuous casting apparatus. The present invention relates to an apparatus for removing a lower nozzle of a molten metal container that can automate a removal operation of a lower nozzle of a molten metal container in a flow rate control device attached to the apparatus.

[0002]

2. Description of the Related Art Generally, a tapping hole formed at the bottom of a molten metal container such as a tundish or a ladle is provided with an upper nozzle for controlling a tapping amount of the molten metal. Below the nozzle, a slide gate for flowing molten metal to the mold and a flow control device equipped with a lower nozzle for the molten metal container are installed. The structure of the molten metal container will be described with reference to FIG.
An inner brick 102 is attached to the inside of 01, and a tuyere block 104 is installed near a tap hole 103 from which molten metal taps.

[0003] An upper nozzle 105 is inserted into a mounting hole formed in the tuyere block 104 of the molten metal container 100.
A slide gate 106 for controlling the flow of the molten metal and a flow control device 108 having a lower nozzle 107 for the molten metal container are installed below the upper nozzle 105.

Further, the lower nozzle 107 of the molten metal container attached to the flow rate control device 108 of the molten metal container 100 is made of a heat-resistant and corrosion-resistant material whose diameter does not change. It is formed in a tapered shape so as to gradually become thinner. The lower nozzle 107 of the molten metal storage container is provided with a rod or a rod in the left-right direction at the inflow side base end of the lower nozzle 107 of the molten metal storage container so as to facilitate the operation when the nozzle is attached to and detached from the flow rate control device 108. A holder 110 having an arm 109 projecting therefrom is attached. After removing the lower nozzle 107 of the used molten metal container from the flow control device 108, the holder 110 is detached from the lower nozzle 107 of the used molten metal container, and the holder 110 is removed from the lower portion of the new molten metal container. By being attached to the nozzle 107, it can be reused.

As described above, although the lower nozzle 107 of the molten metal container is made of a material having corrosion resistance, the amount of wear increases as the number of uses increases, so it is necessary to replace it with a new nozzle. There is. This replacement work, so as not to reduce the work efficiency in continuous casting,
After pouring all molten metal in the container in the casting process,
Used upper nozzle 1 with the storage container body heated and kept warm
05 or the lower nozzle 107 of the molten metal container must be removed and replaced with a new preheated lower nozzle of the molten metal container.

[0006]

However, since the replacement work of the lower nozzle of the molten metal storage container has been carried out exclusively by hand so far, the nozzle itself is large and heavy, and furthermore, the molten metal storage container is large. Desorption of the lower nozzle of the container and disposal of the lower nozzle of the used molten metal storage container are extremely dangerous due to heavy work in a high temperature environment.
There were technical issues such as low work efficiency. Also, when removing the lower nozzle of the molten metal container from the flow control device,
Since the delivery of the lower nozzle of the molten metal storage container involves danger, the lower nozzle of the removed molten metal storage container is dropped as it is onto a work casting floor or the like. Therefore, although the holder can be reused, there is a technical problem that the arm of the holder is broken or deformed due to an impact, and the holder removed from the lower nozzle of the molten metal container cannot be reused. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and has an object to raise a waste pot below a lower nozzle of a molten metal container installed in a flow rate control device. By directly storing the removed lower nozzle of the molten metal container in the waste pot, the work of removing the lower nozzle of the molten metal container is automated, and the lower nozzle holder of the removed molten metal container is It is an object of the present invention to provide an apparatus for removing a lower nozzle of a molten metal container that can prevent breakage.

[0008]

In order to achieve the above object, a lower nozzle removing device for a molten metal container according to the present invention is rotatably supported at one end, and
A lower nozzle disposal pot for a molten metal storage container that is formed in a box-shaped cross section with at least the other end surface and an upper surface opened, and that stores a lower nozzle for the molten metal storage container inside the box-shaped cross section; And a connecting means for connecting the piston rod and the lower nozzle disposal pot of the molten metal container with the cylinder and the piston rod.

[0009] The lower end nozzle is rotatably supported at one end and is formed in a box-shaped cross section with at least the other end face and the upper surface opened. Connecting the lower nozzle waste pot of the molten metal storage container with the lower nozzle waste pot of the molten metal storage container, the cylinder and the piston rod for tilting the waste pot from a horizontal state to an upright state, Connecting means, a rotary actuator provided on one side surface near the open end face of the lower nozzle disposal pot of the molten metal storage container, and one end pivotally supported by the rotary actuator and pivoted about the rotary actuator. And a stopper arm. Further, the other end surface of the lower nozzle disposal pot of the molten metal storage container is provided with a stopper for preventing the lower nozzle of the molten metal storage container having the box-shaped cross section therein from falling off, and provided inside the disposal pot. It has a configuration in which a heat insulating material is formed.

[0010]

When the lower nozzle of the molten metal container is removed by the apparatus for removing the lower nozzle of the molten metal container according to the present invention based on such a configuration, after the molten metal in the molten metal container is completely poured, In order to receive the lower nozzle of the molten metal container of the flow control device installed at the bottom of the molten metal container, the cylinder of the nozzle removal device is operated, and the waste pot is erected through the piston rod and the connecting means. Let it. When the lower nozzle of the molten metal storage container is stored in the waste pot, the lower nozzle of the molten metal storage container is received in the waste pot while tilting the waste pot,
Further, by operating the cylinder to return the waste pot to a horizontal state, the lower nozzle of the molten metal container can be removed.

Further, a stopper arm is rotated by a rotary actuator provided on one side surface near the open end of the lower nozzle disposal pot of the molten metal container, and the stopper arm is brought into contact with the lower nozzle of the molten metal container. By contacting, the lower nozzle of the molten metal container is delivered. Furthermore, the stopper nozzle and the stopper can prevent the lower nozzle of the molten metal storage container stored during the tilting operation of the waste pot from falling off. In addition, since a heat insulating material is formed inside the waste pot, it is possible to prevent the heat of the lower nozzle of the molten metal container from being transmitted to the removal device.

[0012] Therefore, the replacement work of the lower nozzle of the molten metal storage container can be automated even if it is heavy work in a high temperature environment without manual work, and the work efficiency can be improved, and the used molten metal storage can be performed. Since the lower nozzle of the container is removed while being stored in the waste pot, the arm of the holder installed on the lower nozzle of the molten metal container does not break or deform, and the lower nozzle can be removed from the lower nozzle of the molten metal container. Since the used holder can be reused, the economic effect is also improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a schematic side view showing a lower nozzle removing device for a molten metal container according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a top view showing a lower nozzle removing device of the molten metal container. The structure of the molten metal storage container 1 is the same as that of the conventional molten metal storage container. An inner brick 2 is attached to the inside of the storage container main body, and a tuyere block is provided near a tapping outlet from which the molten metal taps. 3 are installed. An upper nozzle 4 is mounted in a mounting hole formed in the tuyere block 3 of the molten metal container 1. Below the upper nozzle 4, a slide gate 5 for controlling the flow of molten metal and a molten metal container A flow control device 7 to which the lower nozzle 6 is attached is installed.

Further, the lower nozzle 6 of the molten metal storage container
Is formed such that a holder 8 having a rod or a handle 8a protruding left and right in a left-right direction is detachably attached to a base end portion on the inflow side of the molten metal, the outer end portion of which is tapered toward the outflow direction. ing. By engaging an arm (not shown) such as a robot or a nozzle attaching / detaching device with the handle 8a of the holder 8, the operation of attaching / detaching the lower nozzle 6 of the molten metal container can be easily performed. Has become.

At the bottom of the flow control device 7, there is provided a nozzle holding arm 9 whose tip swings up and down about one end as a center of rotation. By engaging the protruding handle 8a and lifting the lower nozzle 6 of the molten metal container, the lower nozzle 6 of the molten metal container can be mounted on the flow rate control device 7. Conversely,
By lowering the tip of the nozzle holding arm 9 holding the lower nozzle 6 of the molten metal container, the handle 8a protruding from the holder 8 is separated from the nozzle holding arm 9 and the lower nozzle 6 of the molten metal container. Can be removed.

Lower nozzle removing device 1 for molten metal container
Reference numeral 0 denotes a waste pot 13 rotatably supported on a base 11 around a shaft 12 a having one end fixed to a support base 12, and the molten pot 13 is moved from a normal horizontal state to a molten metal. It comprises a cylinder 14 that is tilted by air pressure or hydraulic pressure until it stands up when the lower nozzle 6 of the storage container is removed. That is, a hollow connection rod for connecting the support table 12 is integrally formed at one end of the disposal pot 13, and both ends of a shaft 12 a passing through the connection rod 13 a are fixed to the support table 12.

The connecting rod 13a has a link 13b.
Are formed integrally, and the tip of the link portion 13b is rotatably locked to the piston rod of the cylinder 14. Therefore, by expanding and contracting the piston rod of the cylinder 14, the link portion 13b and the connecting rod 13a cause the waste pot 13 to be in a horizontal state and an upright state.

Further, the disposal pot 13 is provided on the support table 12.
Is formed in a box shape in cross section with the opposite end face and the upper face opened, and is made of heat-resistant steel sheet so as to be wider than the diameter of the lower nozzle 6 of the molten metal container. Also, since the lower nozzle 6 of the high-temperature molten metal storage container is stored, heat measures such as applying a castable refractory or attaching a heat insulating material to the inside of the disposal pot 13 are taken.

One end of a stopper arm 16 which is rotated by a rotary actuator 15 is pivotally supported on one side surface near the open end surface of the waste pot 13.
The stopper arm 16 is set in a parallel state along one side surface plate of the disposal pot 13 which is normally in a horizontal state, and when the disposal pot 13 is erected by the cylinder 14, the stopper arm 16 is disposed by the rotary actuator 15. The stopper arm 16 is rotated by 90 degrees along the opening surface of the rejecting pot 13, and the tip end of the stopper arm 16 is engaged with a fixing member 17 provided on the opposite side plate.

FIG. 1 shows the place where the lower nozzle removing device 10 for the molten metal container is installed and the tundish car 20 for moving the molten metal container 1 such as a tundish is narrow. So, cast floor G
May be installed in the pit P dug down, or may be installed on the upper surface of the cast-in floor G when the interval is sufficiently ensured.

The operation and operation of the embodiment constructed as described above will be described with reference to FIGS. First, the operation when the lower nozzle 6 of the molten metal container is removed from the flow rate control device 7 installed at the bottom of the molten metal container 1 will be described. After pouring all the molten metal in the molten metal container 1, the molten metal container 1 is moved by the tundish car 20, and the molten metal container of the flow rate control device 7 installed at the bottom of the molten metal container 1 The lower nozzle 6
It stops when it reaches a predetermined position above the nozzle removal device 10.

Next, an arm (not shown) such as a robot or a nozzle attaching / detaching device is attached to the handle 8a of the holder 8.
And remove the lower nozzle 6 of the molten metal container. Then, with the lower nozzle 6 of the molten metal container attached to the bottom of the flow control device 7 placed on the nozzle holding arm 9, the tip of the nozzle holding arm 9 is lowered. Next, the cylinder 14 of the nozzle removing device 10 is operated to raise the waste pot 13. Since the link 13b connected to the piston rod of the cylinder 14 and the connecting rod 13a are integrally formed, the disposal pot 13 can be raised by contracting the piston rod of the cylinder 14. Here, when the disposal pot 13 stands up, as shown in FIG. 4, the lower nozzle 6 of the molten metal storage container held by the nozzle holding arm 9 of the flow control device 7 is inserted from the opening of the disposal pot 13 inside. Is stored in.

Subsequently, when the lower nozzle 6 of the molten metal container is stored in the disposal pot 13, the rotary actuator 15 attached to the side of the disposal pot 13 is operated, and the opening surface of the disposal pot 13 is closed. Then, the stopper arm 16 is rotated 90 degrees. Then, the stopper arm 16
Is locked to a fixture 17 provided on the opposite side surface. Thereby, it is possible to prevent the lower nozzle 6 of the molten metal container from dropping from the disposal pot 13 during the tilting operation of the disposal pot 13 described below.

After the stopper arm 16 is locked, the cylinder 14 of the nozzle removing device 10 is operated in the reverse direction to slightly tilt the disposal pot 13. The stopper arm 16 locked to the nozzle abuts, and the handle 8a protruding from the holder 8 of the lower nozzle 6 of the molten metal container is removed from the hook 9a of the nozzle holding arm 9. As a result, the lower nozzle 6 of the molten metal container is completely separated from the nozzle holding arm 9 and is stored and collected in the waste pot 13. Then, by further operating the cylinder 14, the disposal pot 13 storing the lower nozzle 6 of the molten metal storage container tilts and returns to a horizontal state, and a one-cycle operation of removing the lower nozzle 6 of the molten metal storage container. Is completed

After the lower nozzle 6 of the molten metal container removed from the disposal pot 13 is drawn out to the casting floor, the above-described operation is repeated again to continuously remove the lower nozzle 6 of the molten metal container. You can do it. Further, as shown in FIG. 5, the lower nozzle 6 of the molten metal storage container stored in the disposal pot 13 is not protruded when the disposal pot 13 is tilted. A stopper 18 may be provided.

[0026]

As described above in detail, according to the apparatus for removing a lower nozzle of a molten metal container according to the first aspect, the one end portion is rotatably supported,
A lower nozzle disposal pot for a molten metal storage container that is formed in a box-shaped cross section with at least the other end surface and an upper surface opened, and that stores a lower nozzle for the molten metal storage container inside the box-shaped cross section; Is constituted by a cylinder and a piston rod for tilting the cylinder from a horizontal state to an upright state, and connecting means for connecting the piston rod and a lower nozzle disposal pot of the molten metal storage container. By raising the waste pot, the lower nozzle of the molten metal storage container held by the nozzle holding arm of the flow rate control device can be stored inside the opening of the waste pot, and the molten metal storage container The replacement work of the lower nozzle can be automated even if it is a heavy work under a high temperature environment without manual work, and the work efficiency can be improved.

Further, since the lower nozzle of the used molten metal container is removed while being stored in the disposal pot, the arm of the holder installed in the lower nozzle of the molten metal container may be broken or deformed. In addition, since the holder removed from the lower nozzle of the molten metal container can be reused, the economic effect can be improved.

According to the apparatus for removing a lower nozzle of a molten metal container according to the second or third aspect, the molten metal container is provided on one side surface near the open end face of the lower nozzle disposal pot. Since the rotary actuator and the stopper arm or the stopper are provided, in addition to the above effects, it is possible to prevent the lower nozzle of the molten metal container accommodated during the tilting operation of the waste pot from falling off. This has the effect.

Furthermore, according to the apparatus for removing a lower nozzle of a molten metal container described in claim 4, since the heat insulating material is formed inside the waste pot, the lower nozzle of the molten metal container has a lower thermal resistance. Can be prevented from being transmitted to the removing device.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a lower nozzle removing device for a molten metal container according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a top view showing the lower nozzle removal device for the molten metal container.

FIG. 4 is a side view showing a detached state of a lower nozzle.

FIG. 5 is a side view showing another embodiment of the disposal pot of the nozzle removing device.

FIG. 6 is a schematic sectional view showing the structure of a general molten metal storage container.

[Explanation of symbols]

 Reference Signs List 1 molten metal storage container 5 slide gate 6 molten metal storage container lower nozzle 7 flow control device 8 holder 8a handle 9 nozzle holding arm 10 nozzle removal device 13 waste pot 14 cylinder 15 rotary actuator 16 stopper arm 17 fixing bracket 20 tundish car

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shin Kojima 1 Minami Fuji, Ogakie Town, Kariya City, Aichi Prefecture Toshiba Ceramics Co., Ltd. (72) Inventor Yuichi Kanai 1 Minami Fuji, Ogakie Town, Kariya City, Aichi Prefecture Toshiba Ceramics Co., Ltd. Kariya Works (72) Inventor Kenichi Tsujimoto 1st Minamifuji, Ogakie-cho, Kariya-shi, Aichi Prefecture Toshiba Ceramics Co., Ltd. 72) Inventor Satoshi Kawahito 1850 Minato, Wakayama City, Wakayama Prefecture Sumitomo Metal Industries, Ltd.Wakayama Works (72) Inventor Susumu Tsujida 4-33, Kitahama, Chuo-ku, Osaka City, Osaka Sumitomo Metal Industries, Ltd. (72 Inventor Yoshikazu Kubo Wakayama City, Wakayama Prefecture 1850 Minato Sumitomo Metal Industries Co., Ltd. Wakayama Works (56) References JP-A-8-52548 (JP, A) JP-A-8-19837 (JP, A) JP-A-8-19854 (JP, A) JP-A-6-292955 (JP, A) JP-A-4-228258 (JP, A) JP-A-3-52760 (JP, A) JP-A-57-159258 (JP, A) (58) Int.Cl. ⁶ , DB name) B22D 41/34 520 B22D 11/10 340 B22D 41/56 B22D 11/10 330

Claims (4)

(57) [Claims] 1. A box-shaped cross section having at least one end rotatably supported and having at least the other end face and an upper surface opened, and a lower nozzle for a molten metal storage container is housed inside the box-shaped cross section. A molten metal storage container lower nozzle disposal pot, a cylinder and a piston rod for tilting the disposal pot from a horizontal state to an upright state, and connecting the piston rod and the molten metal storage container lower nozzle disposal pot A lower nozzle removing device for a molten metal container, comprising: 2. A cross-section box-like shape which is rotatably supported at one end and has at least the other end face and an upper surface open, and accommodates a lower nozzle of a molten metal storage container inside the cross-section box-like shape. A molten metal storage container lower nozzle disposal pot, a cylinder and a piston rod for tilting the disposal pot from a horizontal state to an upright state, and connecting the piston rod and the molten metal storage container lower nozzle disposal pot A rotary actuator provided on one side surface near the open end surface of the lower nozzle disposal pot of the molten metal container, and one end pivotally supported by the rotary actuator, and pivoted about the rotary actuator. A lower nozzle removing device for a molten metal container, comprising a stopper arm. 3. A stopper for preventing the lower nozzle of the molten metal container having a box-shaped cross section from falling off is provided on the other end surface of the lower nozzle disposal pot of the molten metal container. 3. The lower nozzle removing device according to claim 1 or 2, wherein the molten metal container has a lower nozzle. 4. The heat dissipating pot according to claim 1, wherein a heat insulating material is formed inside said waste pot to prevent heat from being transmitted from a lower nozzle of the molten metal container. A lower nozzle removal device for a molten metal container according to any one of the above.