KR100729110B1 - Apparatus for automatic-leveling of skirt in converter - Google Patents

Abstract

An apparatus for automatic leveling of a skirt in a converter is provided to improve the recovery ratio of converter gas and prevent a large explosion accident from being occurred in a flue gas duct by automatically adjusting horizontality of a converter skirt. An apparatus for automatic leveling of a skirt in a converter comprises: a plurality of hydraulic cylinders(4) attached to an outer periphery of a converter skirt(3) by cylinder bases(6); sensing devices(100) attached to the cylinders; and drive means(8) and a control device(9) operated by control of a PLC(programmable logic controller)(7) to supply oil to the skirt such that the sensing devices sense the horizontal state of the skirt when the skirt is operated by hydraulic pressure. The sensing devices comprises: a hexagonal box(102) as a body part attached to the cylinder; a ball(103) installed in the box; a horizontality sensing sensor(105) installed at an inner side of a sidewall adhered to the cylinder in six inner sidewalls of the hexagonal box; and a non-horizontality sensing sensor(107) installed on an opposite sidewall.

Description

Converter skirt horizontal automatic control device {Apparatus for automatic-leveling of skirt in converter}

1 is a schematic diagram showing a general converter,

Figure 2 is a schematic diagram showing a converter skirt horizontal automatic adjustment device according to an embodiment of the present invention,

3A and 3B are transmission perspective views showing the action of the sensing device in FIG.

<Description of Symbols for Main Parts of Drawings>

1 ... converter, 3 ... skirt,

4 ... cylinder, 7 ... PLC,

100 ... detector, 101 ... slope,

102 boxes, 103 balls,

105 Horizontal sensor, 107 Non-horizontal sensor.

The present invention relates to a converter skirt horizontal automatic adjustment device, and more particularly, to a converter skirt horizontal automatic adjustment device to automatically maintain whether the converter skirt horizontally by always detecting the horizontal level of the converter skirt.

In general, the converter 1 is provided with a skirt 3 on the upper side thereof to block the inflow of outside air and to enable the sealing operation in order to recycle the exhaust gas generated during the drilling as an energy source, as shown in FIG. do. The skirt 3 is moved up and down manually by an operator and controlled so that the pressure inside the hood 2 is always maintained at zero.

The lifting and lowering operation of the skirt 3 is performed by a cylinder 4 having a plurality of cylinders on the outer circumference of the skirt 3, the cylinder 4 being attached to the skirt 3 by a cylinder base 6 and being oiled. It is operated hydraulically through the inflow pipe 5a and the oil discharge pipe 5b. The oil providing hydraulic pressure to the cylinder 4 is supplied to the driving means 8 by the control of the PLC 7, and the PLC 7 controls the driving means 8 and the regulating device 9 for adjusting the oil supply amount. do.

However, due to internal and external factors, when the skirt 3 is in a non-horizontal state during the elevating operation, the pressure control inside the hood 2 is virtually difficult, so that the explosion and the pollutants in the converter 1 by secondary combustion are brought into the atmosphere. Emissions cause abnormalities in molten steel.

This non-horizontal state of the skirt 3 is generated by the now and slag that is scattered and attached to the periphery when the converter 1 is blown. The non-horizontal state of the skirt 3 thus generated has been operated up and down depending on the visual judgment of the operator because there is no horizontal determination means.

When visual judgment of the operator is performed, it is impossible to observe the entire skirt (3) due to the difficulty of securing the clock due to the dust generated during the drilling and the interference of other facilities in the arrangement of the equipment. Since the closed operation is impossible due to the non-horizontal state, difficulty in controlling to prevent the inflow of external air is inevitably generated.

In addition, since the operator should always visually check whether the skirt 3 is horizontal, not only the fatigue of the operator increases, but also when a large amount of external air flows into the exhaust gas when an error occurs in the operator, secondary combustion of the converter gas is performed and the exhaust gas component is made. When the carbon monoxide component is lowered, the recovery rate of the gas is lowered, and there is a problem in that a large explosion occurs in the exhaust gas duct.

The present invention has been made to solve the conventional problems as described above, to detect the horizontal level of the converter skirt at all times to automatically adjust the horizontal level of the skirt to increase the recovery of the converter gas and large explosion accident in the exhaust gas duct It is an object of the present invention to provide a converter skirt horizontal automatic adjustment device that can be prevented.

In order to achieve the above object, the converter skirt horizontal automatic adjustment device according to the present invention, a plurality of hydraulic cylinder portion is attached to the outer periphery of the converter skirt to operate the lifting and lowering of the converter skirt, and to control the movement of the hydraulic cylinder portion A converter skirt raising and lowering adjusting apparatus including a control unit, the apparatus comprising: a sensing device attached to the plurality of hydraulic cylinders to sense whether the converter skirt is horizontal or non-horizontal and provide information thereof to the controller, The controller is characterized in that the horizontal control of the converter skirt is maintained by controlling the movement of the hydraulic cylinder portion in accordance with the information.

Here, the sensing device, a body portion attached to the hydraulic cylinder portion, a sphere accommodated inside the body portion rotatable therein, and at least one provided inside the body portion to sense the position of the sphere It consists of the above detection unit.

In this case, it is preferable that the sensing device further comprises an inclined plate which forms a lower slope toward the converter skirt side and supports the sphere, wherein the sensing unit is provided at the converter skirt side inside the body part. Preferably, the other one is provided on the inner side opposite to the body portion opposite thereto.

Hereinafter, the converter skirt horizontal automatic adjustment device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram showing a converter skirt horizontal automatic adjustment device according to an embodiment of the present invention.

A plurality of hydraulic cylinders 4 are provided on the outer circumference of the converter skirt 3, and the hydraulic cylinders 4 are attached to the skirt 3 by the cylinder base 6.

The sensing device 100 is attached to the cylinder 4, and attached to each of the cylinders 4 attached to the outer circumference of the skirt 3.

The sensing device 100 may be provided at any position capable of sensing the horizontality of the skirt 3, such as the outer periphery of the skirt 3 or the cylinder base 6, but is preferably attached to the cylinder 3.

The sensing device 100 consists of a box 102 as a body part attached to the cylinder 4. The box 102 is formed of a hexahedron and its interior is unfilled.

A ball 103 is provided inside the box 102, which has a smaller size than the box 102. That is, the diameter of the ball 103 has a size smaller than any one side of the hexahedral box 102, and can move freely inside the box 102.

The inner wall of the hexahedral box 102 is provided with a sensor for detecting the ball (103). More specifically, a sensor 105 for detecting the ball 103 is provided inside the wall attached to the cylinder 4 of the six inner walls of the hexahedral box 102, the opposite side of the sensor 105. That is, the sensor 107 is provided in the opposing inner wall.

The sensor 105 provided on the inner side of the wall where the box 102 is attached to the cylinder 4 is a horizontal sensor 105, and the sensor 107 provided on the opposite inner wall thereof is a non-horizontal sensor 107. )to be.

Each horizontal sensor 105 and non-horizontal sensor 107 is connected to the PLC (7) for controlling the hydraulic pressure provided to the cylinder (4) is configured to send a detection signal.

The hexahedral box 102 is further configured with an inclined plate 101 on the wall in the direction of gravity, that is, the bottom wall. The inclined plate 101 is configured to be inclined downward from the hexahedral box 102 attached to the cylinder 4 to the cylinder 4 side and to the skirt 3 side.

Hereinafter, the operation of the converter skirt horizontal automatic control device according to an embodiment of the present invention.

When the skirt 3 is supplied with oil to the driving means 8 and the regulating device 9 under the control of the PLC 7 and operated by hydraulic pressure, each of the sensing devices 100 is horizontal to the skirt 3. Detect the condition.

The sensing device 100, which is provided on the outer circumference of the skirt 3 having a circular shape in a plane, determines whether or not it is horizontal by the movement of the balls 103 provided in the respective boxes 102.

That is, the balls 103 provided in the box 102 are all skirted by the inclined plate 101 having a lower slope toward the skirt 3 when the skirt 3 is horizontal, as shown in FIG. 3A. Roll in the direction of ()) to contact the horizontal sensor (105).

If one side of the skirt 3 is inclined downward, the ball 103 inside the box 102 on the side comes into contact with the non-horizontal detection sensor 107 as shown in FIG. 3B.

The signals of the horizontal sensor 105 and the non-horizontal sensor 107 provided in the sensing device 100 attached to each cylinder 4 are transmitted to the PLC 7 so that the skirt 3 is tilted to which side. It is possible to determine whether or not.

The PLC 7 determines the detection signal and transmits the non-horizontal detection sensor 107 signal through the driving means 8 and the adjusting device 9 and / or the side where the horizontal detection sensor 105 signal is transmitted. By correcting the cylinder 4 of the skirt 3 is made horizontal. That is, the cylinder 4 on the side to which the horizontal sensor 105 signal is transmitted is lowered, or the cylinder 4 on the side to which the non-horizontal sensor 107 signal is transmitted is raised, or the former and the latter are both. By performing everything, the skirt 3 is horizontally corrected.

The angle with respect to the bottom wall of the box 102 of the inclination plate 101 in the box 102 can be determined by a worker's request, or by the horizontal allowable tolerance in normal converter skirt 3 operation.

It is preferable to set the horizontal allowable tolerance within the normal converter skirt 3 operation within 3 degrees. That is, when the inclination of the inclined plate 101 is set to 3 degrees, the sensing is performed only when the skirt 3 is inclined to 3 degrees or more.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains recognize that modifications and variations can be made to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. shall.

As described above, the converter skirt horizontal automatic adjustment device according to the present invention, by detecting whether the converter skirt horizontally at all times to automatically adjust the horizontal level of the skirt to increase the recovery rate of the converter gas due to energy savings Achieve savings, protect equipment and workers by preventing large explosion accidents in the flue gas ducts, and improve the productivity of operations by eliminating the human eye observation.

Claims (4)

In the converter skirt raising and lowering control device including a hydraulic cylinder portion is attached to the outer periphery of the converter skirt to operate the lifting and lowering of the converter skirt, and a control unit for controlling the movement of the hydraulic cylinder portion, And a sensing device attached to the plurality of hydraulic cylinders to detect horizontal and non-horizontality of the converter skirt and to provide information to the controller, wherein the controller controls movement of the hydraulic cylinders according to the information. The converter skirt horizontal automatic adjustment device, characterized in that to keep the converter skirt horizontal. The method of claim 1, The sensing device, A body part attached to the hydraulic cylinder part, a sphere accommodated inside the body part and rotatable therein, and at least one sensing part provided inside the body part to detect a position of the sphere. Converter skirt horizontal automatic control device. The method of claim 2, The sensing device, the converter skirt horizontal automatic control device further comprises a slanted plate that forms a lower slope toward the converter skirt side and supports the sphere. The method of claim 2, The sensing unit, the converter skirt horizontal automatic adjustment device, characterized in that one is provided on the inner side of the converter skirt, the other is provided on the inner side opposite to the body portion opposite thereto.

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