KR200291563Y1 - Check ball automatic feeding device of ladle vortex generating part - Google Patents

Abstract

The present invention relates to a check ball automatic feeding device of the ladle vortex generating unit which automatically inputs a check ball to suppress the vortex generation by inserting into the molten steel of the ladle as a continuous air conditioning equipment,

In the device for inserting the check ball into the molten steel of the ladle at a suitable time to suppress the generation of vortex, the ladle support 170 is provided with a weighing sensor 10 for measuring the weight of the ladle 110, the ladle One side of the upper portion 110 is provided with a runner 50 inclined downward toward the ladle 110, the upper side of the runner 50 is equipped with a rotary plate 40 that is rotated by the electric motor 32, the rotary plate A check ball 60 is placed at an interval at a predetermined interval in the circumferential direction on the upper surface edge portion of the 40, and a pusher that moves back and forth toward the runner 50 from the rotation center of the rotating plate 40 at an upper portion of the rotating plate 40 ( 82), the rotational position of the rotating plate 40 is characterized by being sensed by the sensor (46).

Description

Check ball automatic feeding device of ladle vortex generating part

The present invention relates to an automatic check ball input device of the ladle vortex generating unit for automatically inserting a check ball to suppress the vortex generation by inputting to the molten steel of the ladle as a continuous air conditioning equipment.

In general, the continuous casting facility discharges the molten steel in the ladle 110 to the tundish 130 through the nozzle 120, the molten steel of the tundish 130 is discharged to the bottom via the mold 140, so discharged The molten steel has a configuration to be manufactured as a cast while passing through the cooling table 150 installed on the lower side of the mold (140).

In such a facility, a technique for preventing the slag 114 present in the upper portion of the molten steel 112 in the ladle 110 into the molten steel 112 is very important to improve the cast quality.

In general, the phenomenon that the slag 114 is mixed into the molten steel 112 and discharged toward the tundish 130 is mainly caused by the vortex 116 generated by the flow of the molten steel 112 discharged through the nozzle 120. In the related art, the generation of the vortex 116 is suppressed by a technique of forming the vortex prevention dam 160 on the bottom of the bottom surface of the ladle 110, but the vortex prevention dam 160 is a hot molten steel 112. Depressed by the vortex generated in the) has the disadvantage of not fully functioning.

Recently, a ball-shaped check ball is introduced at the time of generation of the vortex 116 generated in the molten steel 112 in the ladle 110 to suppress the formation of the vortex 116 while the check ball. A technique of effectively suppressing the discharge of slag by blocking the inlet of the nozzle at the time when the slag is discharged downward through the nozzle by making the specific gravity of the intermediate point between molten steel and slag is disclosed.

However, it was not easy to put such a check ball into the ladle, so the primitive method of inserting a check ball using a forklift was mainly used, and in the case of inserting a check ball using a forklift, the check was performed. Since it is difficult to accurately match the timing of the ball insertion, even if the vortex occurrence time is predicted in advance by various operating conditions, and the timing of the check ball is determined, practically, the check ball cannot be accurately injected at that time. There was a problem that the slag of is discharged to the tundish side.

The present invention was devised to solve such a conventional problem, and its purpose is to automatically insert a check ball into the molten steel upper part of the ladle at the time of vortex generation so that the slag can be effectively prevented from being mixed into the molten steel. It is to provide a check ball automatic injection device of the vortex generating unit.

1 is a schematic configuration diagram showing a configuration in which a vortex prevention dam is installed in a ladle of a general continuous casting facility;

Figure 2 is a schematic configuration diagram of the ladle vortex generating unit automatic check ball input device according to the present invention as a whole

3 is a view schematically showing a configuration of the upper side of the rotating plate of the present invention.

Explanation of symbols on the main parts of the drawings

10 ... Weighing sensor 30 ... Rotating plate drive unit

32 ... electric motor 40 ... rotating plate

42 ... check ball room 44 ... bulkhead

46 ... sensor 50 ... runner

60 ... check ball 74 ... door

80 ... pusher drive 82 ... pusher

84 ... pusher drive

As a technical configuration for achieving the above object, the present invention,

In the device for introducing the check ball into the molten steel of the ladle at a time appropriate to suppress the vortex generation,

Install a weighing sensor for measuring the weight of the ladle on the ladle support, install a runner inclined downward toward the ladle side on one side of the ladle, the upper side of the runner is equipped with a rotating plate rotated by an electric motor, A check ball is placed at the edge of the upper surface of the rotating plate at regular intervals in the circumferential direction, and a pusher for advancing back and forth from the center of rotation of the rotating plate to the runner side is mounted, and the rotating position of the rotating plate is detected by the sensor. By providing a check ball automatic injection device characterized in that the ladle vortex generating unit.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic configuration diagram showing a check ball automatic injection device of the ladle vortex generating unit according to the present invention as a whole, the ladle 110 and the total weight of the molten steel, etc. contained in the ladle support 170 for supporting the ladle 110. Weighing sensor 10 for measuring the is mounted. Of course, such a weighing sensor 10 is preferably installed in the portion where the ladle 110 is mounted.

The bottom 20 is installed on the upper portion of the ladle 110 is installed, the device of the present invention is formed, the top of the bottom 20 is provided with a rotating plate driving unit 30, the rotating plate driving unit 30 It has an electric motor 32.

The rotary shaft 34 of the electric motor 32 extends a predetermined length to the top, and the central portion of the lower surface of the rotary plate 40 formed in a disc shape having an appropriate size is fixed to the end of the rotary shaft 34. This allows the rotating plate 40 to rotate in a horizontal state when the power is applied to the electric motor 32.

In addition, a runner 50 having a downward inclined surface 52 toward the ladle 110 is mounted at one side of the rotating plate driving unit 30 on the bottom 20, and the runner 50 is provided with the rotating plate 40. It serves as a path connecting the ladle 110 to each other. Of course, the downward slope 52 of the runner 50 is formed with a concave groove (not shown) connecting the rotating plate 40 and the ladle 110, the check ball to be described later along the groove rolls to the ladle 110 It is preferable to make it fall.

As shown in Fig. 3, the rotating plate 40 has a plurality of check ball receiving chambers 42 formed in succession to have the same interval in the circumferential direction while being at the same radial position with the center of rotation as the center thereof. The chamber 42 is divided by the partition 44 formed integrally with the rotating plate 40 and erected vertically.

Each of the check ball accommodation chambers 42 is provided with a check ball 60, and various means are possible to maintain the check ball 60 in the check ball accommodation chamber 42 when no other external force is applied. Bar, for example, it is preferable to form a concave groove in which the check ball 60 can be placed on the upper surface between the partition walls 44 of the rotating plate 40.

In addition, a guard 70 surrounding the rotating plate 40 is installed, and the guard 70 is fixed to the floor 20 through a connecting rod not shown, and forms a large pipe shape. The guard 70 forms a check ball outlet 72 at the lower end of the upper side of the runner 50, and the check ball outlet 72 is openable by a door 74.

The door 74 is rotatably connected to the guard 70 via a pin 76 at an upper end thereof. The door 74 is provided with an elastic force by a torsion spring (not shown) so that the door 74 is a check ball of the guard 70. The discharge port 72 is closed, and such a door 74 is pushed by the check ball 60 when the check ball 60 moves to the runner 50 side by a pusher to be described later, and then rotates and rises. The outlet 72 is opened.

In addition, a means for grasping the rotational position of the rotating plate 40 is provided, which is a sensor 46 (which may be a limit switch, respectively) on the partition wall 46 of the rotating plate 40, or various forms such as an optical sensor. And a sensor sensitive body 78 which works with the sensor 46 so that the sensor 46 can emit an electrical signal.

The pusher driver 80 is installed on the upper part of the rotating plate 40, and the pusher driver 80 pushes the check ball 40 located in the upper check ball receiving chamber 42 of the rotating plate 40 to check ball. It has a pusher 82 for feeding into the ladle 110 through the runner 50 through the discharge port 72, the pusher 82 by the pusher driving body 84 from the center of the rotary plate 40 Allow it to move forward and backward on the (50) side. Of course, the pusher driver 84 may be a cylinder, it is also possible to configure using a motor.

The weighing sensor 10, the electric motor 32, the sensor 46, and the pusher driving body 84 are electrically connected to and controlled by a separate control unit, not shown, and the control unit operates the device in a proper order in advance. It is preprogrammed to do this.

In order to inject the check ball into the ladle using the apparatus of the present invention having the above configuration, the check ball 60 is filled in each of the check ball accommodation chambers 42 of the rotating plate 40, and the pusher 82 is In the reversed state (of course, when the pusher 82 is in the reversed state, the pusher 82 does not interfere with the rotary plate 40, the partition wall 44, the check ball 60 and the guard 70). Wait for ball input.

Of course, when in the standby state, one of the check balls 60 waits at the entrance of the closed door 74.

When the ladle 110 containing the molten steel is placed on the ladle support 170 and the molten steel is pulled out to the tundish side, the total weight of the ladle 110 and the molten steel by the weighing sensor 10 are continuously measured and transmitted to the controller. Take this value and perform the comparison operation with the set weight, and determine the proper time, ie the time of the check ball input. Of course, this determination will be the point at which the overall weight of ladle 110 and molten steel becomes smaller than the pre-programmed setpoint, and the operator may control it manually.

At the time of check ball input, the control unit issues a command to the pusher driver 84 to operate the pusher 82, whereby the pusher 82 moves forward, and the pusher 82 moves the check ball 60 to the door 74. Is released to the outside while forcibly opening.

The check ball 60 thus released is introduced into the molten steel of the ladle 110 along the downward slope 52 of the runner 80 to suppress the generation of vortex formed in the molten steel.

Subsequently, a reverse command is given to the pusher driver 84, whereby the pusher 82 moves back and returns to the initial state.

When the pusher 82 is reversed, the control unit issues a rotation command to the electric motor 32, and thus the rotating plate 40 connected to the electric motor 32 rotates.

When the rotating plate 40 is rotated by a predetermined angle, the check ball 60 is released and the check ball 60 of the check ball accommodation chamber 42 adjacent to the empty check ball accommodation chamber 42 is the door 74 entrance side. The sensor 46 senses by the sensor-sensitive body 78 at a time point at which is located, so that the control unit stops the rotation of the electric motor 32 so that the other check ball 60 of the door 74 It is possible to wait for input at the entrance.

According to the check ball automatic feeding device of the ladle vortex generating unit according to the present invention having the above-described configuration, the check ball is automatically injected into the molten steel at the time of the check ball input to effectively suppress the generation of the vortex formed in the molten steel inside the ladle. This improves the error rate, and also has the effect of improving the cast quality.

Claims (1)

In the device for introducing the check ball into the molten steel of the ladle at a time appropriate to suppress the vortex generation, Installing a weighing sensor 10 for measuring the weight of the ladle 110 on the ladle support 170, and installs a runner 50 inclined downward toward the ladle 110 on one side of the ladle 110, The upper side of the runner 50 is equipped with a rotating plate 40 which is rotated by the electric motor 32, and the check ball 60 is placed at an interval in the circumferential direction on the upper surface edge of the rotating plate 40. The pusher 82 is mounted on the upper part of the rotating plate 40 to move forward and backward from the center of rotation of the rotating plate 40 toward the runner 50, and the rotational position of the rotating plate 40 is detected by the sensor 46. Check ball automatic dosing device for ladle vortex generating unit characterized in that the.