KR101009696B1 - Drain apparatus of bubbling gas - Google Patents

Abstract

The present invention relates to a drainage device for bubbling gas, wherein the bubbling gas remaining in the supply pipe is discharged by discharging the bubbling gas remaining in the supply pipe when the supplying of the bubbling gas supplied to the taps in the tap is stopped. Molten explosions can be reduced, so that the worker can work more safely when working in the lower part of the cart to separate the lower line.

Water cart, water ladle, molten steel explosion, bubbling gas, drain, discharge, self maintenance

Description

Drain apparatus of bubbling gas {DRAIN APPARATUS OF BUBBLING GAS}

The present invention relates to a drainage device for bubbling gas, and more particularly, to stop bubbling gas supplied to water taps in a water tank from a bubbling gas for discharging the bubbling gas remaining in a supply pipe. It relates to a drain device.

In general, the steelmaking process for refining molten iron with molten steel is divided into converter refining, which is refined in converters, and out-of-house refining, which is refined in casters.

The means of transportation of grading ladles containing approximately 275 tonnes of molten steel are ground trolleys and aerial cranes. The movement between the steelmaking processes is carried by these means of transportation. It is handled directly in classes.

In this series of out-of-furnace refining processes, there is a bottom bubbling operation, which is performed to prevent segregation of molten steel in the steel ladles or injuries to separate inclusions, and the medium used for the lower bubbling is an inert gas. Nitrogen and argon. These inert gases are supplied from the high pressure storage tank through the gas transfer cable to the lower part of the water tank, and temporarily held by the end valve, and then the bottom of the water tanks and the ends of the water tank are seated on the water tank. Bottom bubbling can be accomplished by interconnecting the bottom with the valve and opening the end valve.

For the lower bubbling operation, the lower line is fastened or the opening and closing operation of the end valve is directly engaged by the operator. When the classmates are seated in the water cart, the workers enter the lower portion of the water cart to fasten the bottom valves or end valves. Opening operation is performed, and when separating cranes by using cranes in the cart, the lower part must be separated from each other and the end valve of the lower part of the tap should be locked.

The technology described above refers to the background of the technical field to which the present invention belongs, and does not mean the prior art.

As described above, the operator directly enters the lower part of the water cart to work to fasten the lower line for the lower bubbling operation, to open the end valve, to separate the lower lines from each other, or to close the end valve. When the end valve is shut off to separate the line, when the bubbling gas flows out due to the bubbling gas remaining in the supply pipe, a slowly generated gas bubble penetrates the slag on the upper part of the molten steel and blows up the molten steel. There is a problem that can result in death.

The present invention has been made to solve the above problems, the stop device of the bubbling gas for discharging the bubbling gas remaining in the supply pipe when the supply of the bubbling gas supplied to the siege in the water carts to stop The purpose is to provide.

Drain device for bubbling gas according to an aspect of the present invention comprises a drain valve branched from the lower portion of the bogie for supplying the bubbling gas from the water cart to the tap ladle; A valve driver for driving the drain valve; And an operation lamp for displaying an operation state of the valve driving unit.

In the present invention, the drain valve is characterized in that the solenoid valve.

In the present invention, the valve driving unit includes a drain switch for draining the bubbling gas; A magnetic switch for driving by applying power to the drain valve; A magnetic switch relay for operating the magnetic switch by a self-hold circuit in operation of the drain switch; And a timer relay for releasing the magnetic holding of the magnetic holding circuit.

In the present invention, the self-holding circuit includes a first relay switch connected in parallel with the drain switch, and a second relay switch for applying power to the magnetic switch relay; A self-maintaining relay to which power is applied by the operation of the drain switch to operate the first relay switch and the second relay switch; And a self-hold release switch connected in series between the drain switch and the self-hold relay to be blocked by the timer relay.

In the present invention, the operation lamp is characterized in that the operation of the magnetic switch relay on and off by the operation of the lamp switch.

The present invention is characterized in that it further comprises an overload circuit breaker for shutting off the power when the valve driver is overloaded.

As described above, the present invention reduces the molten steel explosion due to the outflow of the bubbling gas remaining in the supply pipe by discharging the bubbling gas remaining in the supply pipe when stopping the supply of the bubbling gas supplied to the sieves in the water tank. This allows the worker to work more safely when working in the lower part of the cart to separate the underline.

Hereinafter, an embodiment of a draining device for bubbling gas according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or convention. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a view showing a mounting state of the drain valve by the drain device of the bubbling gas according to an embodiment of the present invention, Figure 2 is for operating the drain device of the bubbling gas according to an embodiment of the present invention A circuit configuration diagram specifically showing a driving circuit.

As shown in FIG. 1, the gas storage tank 10 is supplied to the lower portion 35 of the bogie 30 through the gas transfer cable 20 and temporarily suspended by the end valve 50. The lower end of the ladle 45 of the receiving ladle 40 seated on the receiving cart 30 and the lower end 35 having the end valve 50 of the receiving bogie 30 are connected to each other, and the end valve 50 is connected. By opening the bubbling gas through the supply pipe 60 into the molten steel of the tapping ladle 40, a bottom bubbling operation is performed.

In addition, a drain valve 70 for discharging the bubbling gas remaining in the supply pipe 60 is provided between the end valve 50 and the lower portion of the bogie 35.

Therefore, even if the bubbling gas is leaked while the end valve 50 is locked, when the bubbling gas remaining in the supply pipe 60 is discharged through the drain valve 70, the molten steel explosion in the water tap ladle 40 occurs. Prevents the work in the lower portion of the water cart 30 to be safe.

As such, the draining device of the bubbling gas for the drain of the bubbling gas supplied to the receiving ladles 40 in the receiving cart 30 may supply the bubbling gas to the receiving ladles 40 in the receiving cart 30. A drain valve 70 branched off from the lower portion of the cart 35; A valve driver 80 for driving the drain valve 70; And an operating lamp (LAMP) for displaying the operating state of the valve driving unit 80.

At this time, the drain valve 70 is driven by the electrical operation of the valve drive unit 80 as a solenoid valve.

In addition, the valve driving unit 80 includes a drain switch 110 for draining the bubbling gas; A magnetic switch 150 for driving by applying power to the drain valve 70; A magnetic switch relay MC for operating the magnetic switch 150 by the magnetic holding circuit 100 when the drain switch 110 is operated; And a timer relay T for releasing the magnetic holding of the magnetic holding circuit 100.

The magnetic holding circuit 100 may include a first relay switch 120 connected in parallel with the drain switch 110; A second relay switch 130 for applying power to the magnetic switch relay MC; A self-holding relay (RY) for supplying power by operating the drain switch 110 to operate the first relay switch 120 and the second relay switch 130; And a self hold release switch 140 connected in series between the drain switch 110 and the self hold relay RY and blocked by the timer relay T.

And, the operation lamp (LAMP) is turned on and off by the operation of the lamp switch 160 in accordance with the operation of the magnetic switch relay (MC).

In addition, the overload circuit breaker 170 for shutting off the power supplied from the power supply unit 90 when the overload of the valve driving unit 80 further protects the valve driving unit 80 and the drain valve 70.

Referring to the operation of the drain device of the bubbling gas made as described above are as follows.

When the drain switch 110 is operated to drain the bubbling gas, power is applied to the self hold relay RY of the self hold circuit 100 so that the first relay switch 120 and the second relay switch 130 are operated. It works.

At this time, the self-maintenance release switch 140 is a normal close switch to maintain the on state in the normal state.

Therefore, even after the drain switch 110 is turned off, the operation state is maintained as power is continuously applied to the self-holding relay RY by the first relay switch 120.

In addition, as the second relay switch 130 operated by the self-holding relay RY is operated, power is applied to the magnetic switch relay MC to operate the magnetic switch 150 to supply power to the drain valve 70. The bubbling gas is discharged while being applied to operate the drain valve 70.

As described above, the magnetic switch relay MC operates to operate the lamp switch 160 to light the operation lamp LAMP, thereby indicating that the bubbling gas is being discharged by the operation of the drain valve 70.

On the other hand, when the power is applied to the timer relay T while the second relay switch 130 is operated, the timer is operated according to the timer being operated for a predetermined time and then the magnetic maintenance release switch 140 is operated to maintain the magnetic maintenance relay RY. The first relay switch 120 and the second relay switch 130 are turned off by cutting off the power supplied to the first relay switch 120.

As the second relay switch 130 is turned off as described above, the power supplied to the magnetic switch relay MC is cut off and the magnetic switch 150 is turned off to stop the operation of the drain valve 70, and the lamp switch 160. ), Turn off the operation lamp (LAMP).

In addition, as the first relay switch 120 is turned off and the power supplied to the magnetic holding relay RY is cut off, the magnetic holding release switch 140 is restored to its normal state and the magnetic holding is released.

As the drain switch 110 is operated as described above, the drain valve 70 is operated for a predetermined time to discharge the bubbling gas remaining in the supply pipe 60.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand. Therefore, the technical protection scope of the present invention will be defined by the claims below.

1 is a view showing a mounting state of the drain valve by the drain device of the bubbling gas according to an embodiment of the present invention.

2 is a circuit diagram illustrating in detail a driving circuit for operating a drain device of a bubbling gas according to an exemplary embodiment of the present invention.

   -Explanation of symbols for the main parts of the drawings-

10: gas storage tank 20: gas transfer cable

30: Course Balance 35: Balance Bottom

40: ladle 45: ladle bottom

50: end valve 60: supply pipe

70: drain valve 80: valve drive unit

90: power supply unit 100: magnetic holding circuit

110: drain switch 120: first relay switch

130: second relay switch 140: magnetic holding release switch

150: magnetic switch 160: lamp switch

170: overload breaker RY: self-sustaining relay

T: Timer Relay MC: Magnetic Switch Relay

LAMP: Operation Lamp

Claims (6)

A drain valve branched from the lower portion of the bogie to supply the bubbling gas from the bogie to the sieves; A valve driver for driving the drain valve; And And an operation lamp for displaying an operation state of the valve driving unit. 2. The apparatus of claim 1, wherein the drain valve is a solenoid valve. The method of claim 1, wherein the valve drive unit A drain switch for draining the bubbling gas; A magnetic switch for driving by applying power to the drain valve; A magnetic switch relay for operating the magnetic switch by a magnetic holding circuit during operation of the drain switch; And And a timer relay for releasing the self holding of the self holding circuit. 4. The magnetic retention circuit of claim 3, wherein A first relay switch connected in parallel with the drain switch; A second relay switch for applying power to the magnetic switch relay; A self holding relay for supplying power by operating the drain switch to operate the first relay switch and the second relay switch; And And a self-holding switch connected in series between the drain switch and the self-holding relay and cut off by the timer relay. 4. The draining device of claim 3, wherein the operation lamp is turned on or off by operation of a lamp switch according to the operation of the magnetic switch relay. The apparatus of claim 1, further comprising an overload circuit breaker for shutting off power when the valve driver is overloaded.

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