KR20030001717A - mothod and apparatus for moving-type colling of electrodes - Google Patents

Abstract

PURPOSE: A moving-type electrode cooling device is provided which approaches the lower part of an electrode for generating arc in an electric furnace only during a non-conducting period of time to inject cooling water thereto, and a method for cooling the electrode using the moving-type electrode cooling device is provided. CONSTITUTION: The moving-type electrode cooling device comprises an electrode holder(20) which is fixed to the electrode to hold the upper outer circumferential surface of an electrode(10) that is installed on the upper side of an electric furnace; a support arm(40) and a pillar(50) which are extended from the electrode holder(20) and vertically move the electrode(10) up and down; an injection pipe(30) which is fixed to the lower side of the electrode holder(20) to inject cooling water to the side of the electrode(10); a cooling means which is rotationally moved so that the cooling means covers the lower part of the electrode(10) by a rotational moving means when the electrode(10) is non-conducted and positioned at the upper limit, and which injects cooling water to the side of the electrode(10); a conducting sensor(330) and a position sensor(320) for sensing non-conduction and position of the electrode(10); and a control part(400) for controlling actions of the cooling means and the rotational moving means respectively by receiving signals outputted from the conducting sensor(330) and the position sensor(320), wherein the cooling means comprises a pair of nozzle pipes(110A,110B), a cooling water supply pipe(130), an air supply pipe(140) and a switch valve(150), the rotational moving means comprises a hinge shaft(125), a first rotation part(230), a rotation arm(220), a rotation pillar(210) and a second rotation part(240), and the first rotation part(230) comprises a rod(232), a cylinder(234) and a link member(235).

Description

Mobile cooling method of electrode and apparatus therefor {mothod and apparatus for moving-type colling of electrodes}

The present invention relates to a mobile cooling method of the electrode and an apparatus thereof, and more particularly to a mobile cooling method and apparatus of the electrode for approaching the lower end of the electrode for generating an arc in the electric furnace only when non-energized to spray the coolant.

In general, electric furnace steelmaking generates an arc between a raw material charged into a furnace and an electrode tip, and heats the raw material with heat generated accordingly, and the tip of the electrode is consumed by the arc and the heat generated at the tip.

In addition, surface consumption occurs in which the electrode heated by arc heat is oxidized and consumed by contact with the atmosphere.

Since the consumption of the electrode is increased as the temperature of the electrode due to the heat of the arc is higher, it must be equipped with a separate cooling device.

As shown in FIG. 1, a conventional electrode cooling apparatus includes an electrode 10 vertically installed at an inlet of an electric furnace 1, and surrounds an upper outer peripheral surface of the electrode 10 and vertically surrounds the electrode 10. An electrode holder 20 for moving, an injection pipe 30 disposed below the electrode holder 20 for spraying cooling water to the upper outer circumferential surface of the electrode 10, an injection pipe 30, and an electrode holder 20 It is composed of a support arm 40 is supported, and a support stand 50 for vertically moving the support arm 40 vertically installed on the end of the support arm 40.

In the conventional electrode cooling apparatus, cooling water is injected from the injection pipe 30 to the outer circumferential surface of the electrode 10, and the injected cooling water flows down the outer circumferential surface of the electrode 10 to perform a cooling function.

At this time, the cooling water is evaporated by the high temperature of the electrode 10 or the cooling water is supplied only to the upper end of the electrode 10 due to the structural characteristics of the electrode 10 whose outer diameter becomes smaller toward the lower side.

Therefore, in the conventional electrode 10, even though the coolant is injected, the cooling is performed only at the upper end, and the cooling effect is lowered at the lower end, resulting in a phenomenon of rapid consumption due to the high temperature arc heat. do.

In addition, in order to solve this problem, the lower end of the electrode may be provided with a separate cooling means, but this is energized when moving downwards for charging the electrode of the electrode, there was a problem of equipment damage due to spark accident and contact with the electric furnace. .

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a mobile cooling method and apparatus for cooling an electrode for cooling the lower end of the electrode by automatically moving when the electrode is non-conductive and in the upper limit position. There is.

1 is a schematic view showing a conventional apparatus for cooling an electrode.

Figure 2 is a perspective view showing a movable cooling apparatus of the electrode according to an embodiment of the present invention.

3 is a plan view showing the operating state of FIG.

4 is a flowchart showing a method of cooling an electrode of the present invention.

Explanation of symbols on the main parts of the drawings

1: electric furnace 10: electrode

20: electrode holder 30: injection pipe

40: support arm 50: prop

110A, 110B: Nozzle pipe (one side and the other side)

115a: injection hole 125: hinge axis

130: cooling water supply pipe 140: air supply pipe

150: on-off valve 210: rotary support

212: upper support post 212a: gear (upper support post)

214: lower strut 220: rotating arm

230: first rotating part 232: rod

234: cylinder 235: link member

240: second rotating unit 242: driving motor

244: motor shaft 310: proximity sensor

320: position sensor 330: energization sensor

A feature of the present invention for achieving the above object is the step of detecting whether the electrode installed in the vertically movable above the electric furnace in the non-conductive and the upper limit position;

If it is determined that the electrode is in the non-energized and the upper limit position step of rotating the nozzle pipe on one side of the pair of nozzle pipes installed to be rotated left and right to move outwards, and rotates the open both sides of the nozzle pipe to the position near the lower end of the electrode And a step of wrapping the one side nozzle pipe to cover the outer peripheral surface of the electrode so as to maintain a proper distance, and forcing a plurality of injection holes formed in the nozzle pipes to press the cooling water at an appropriate pressure to spray the electrode to the electrode side; After the spraying of the coolant is completed, the one side of the nozzle pipe is opened again and then moved to the original position, and the movement of the nozzle pipe and the coolant injection of each of the above steps including the step of controlling the control to be repeatedly circulated by the controller in the mobile cooling Is on the way.

Still another feature of the present invention includes an electrode holder fixed to hold an upper outer circumferential surface of an electrode provided on an upper side of an electric furnace; A support arm and a support for extending from the electrode holder and moving the electrode vertically; A spray pipe fixed to the lower side of the electrode holder to spray cooling water to the electrode side; Cooling means which is rotated so as to surround the lower end of the electrode by rotation moving means when the electrode is non-energized and in the upper limit position, and injects coolant to the electrode side; Detectors for respectively sensing non-energization and position of the electrode; And a controller configured to control the operations of the cooling means and the rotary movement means by receiving signals output from the detectors.

Hereinafter, exemplary embodiments of a mobile cooling method and an apparatus of the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in FIGS. 2 and 4, the movable cooling method of the electrode of the present invention detects whether the electrode 10 installed on the upper side of the electric furnace 1 is in a non-electrical and upper limit position (S1, S2). If it is determined to be normal, open one of the pair of nozzle pipes (110A, 110B) (S3) and move the nozzle pipes (110A, 110B) to the position near the lower end of the electrode (10) (S4), When the close movement to the outer peripheral surface of 10) is completed, the nozzle pipe 110A is opened again and then closed (S5), and the cooling water is pumped to the electrode 10 side (S6), and when the injection of the cooling water is completed, both nozzle pipes ( After moving the distance between the 110A, 110B to rotate to the original position (S7), wherein the operation of the nozzle pipe (110A, 110B) and the coolant injection, respectively operated in the step of controlling to be repeated in the control unit 400 ( S8).

The operation of the nozzle pipe (110A, 110B) is the rotation of the nozzle pipe (110A, 110B) and the opening and closing of the nozzle pipe (110A) of one side by the first and second rotating parts (230, 240) controlled by the control unit 400 Action is taken,

At this time, one side of the nozzle pipe (110A) has an operation to open or pinch in accordance with the reciprocating motion of the cylinder 234 and the rod 232 of the first rotating part 230.

In addition, the step of rotating the nozzle pipes 110A and 110B to a position near the lower end of the electrode 10 may include a proximity sensor 310 for detecting a distance from the electrode 10 to the inner surface of the other nozzle pipe 110B. And a signal output from the proximity sensor 310 is applied by the controller 400 to control the rotation of the nozzle pipes 110A and 110B.

2 and 3 is a view showing an embodiment of the mobile cooling apparatus of the electrode according to the method described above, Figure 2 is a perspective view showing the configuration of the embodiment of the present invention, Figure 3 is a plan view representing the operating state of Figure 2 step by step to be.

The electrode 10 is vertically installed above the inlet of the electric furnace 1, and the electrode holder 20, which is integrally installed on the support arm 40 and supports the electrode 10, is installed on the upper part of the electrode 10. It is installed.

In addition, a lower portion of the electrode holder 20 is provided with a spray pipe 30 for spraying cooling water onto the upper outer circumferential surface of the electrode 10, and the support arm 40 moves the support arm 40 up and down at an end thereof. A strut 50 for vertical movement is installed perpendicular to the ground.

Description of the above configuration is the same as the conventional one, and the configuration of the cooling means, the rotary moving means and the control unit 400, etc., which can be said to the gist of the present invention are as follows.

First, the cooling means are formed to be symmetrical to each other and one side is hinged to the hinge shaft 125 to be rotatable, the other side is fixedly installed, a pair of nozzle pipes formed with a plurality of injection holes (115a) on both sides of the lower side 110A and 110B, a coolant supply pipe 130 that guides the nozzle pipes 110A and 110B to supply cooling water at an appropriate pressure, and an air supply pipe 140 that guides the air at an appropriate pressure to the cooling water supply pipe 130. And an on / off valve 150 for selectively supplying cooling water and air to the cooling water supply pipe 130 and the air supply pipe 140, respectively.

In addition, the nozzle pipes 110A and 110B may rotate one side coupled to the hinge by a rotation moving means to manipulate the distance to the other side, and the nozzle pipes 110A and 110B may have lower ends of the electrodes 10. It has a structure capable of moving close to and returning to its original position.

The rotary movement means is installed horizontally on the upper side of the rotary support stand 210 and the rotary support stand 210 is installed at a distance that does not interfere with the support stand 50 and rotates the nozzle pipe (110A, 110B) On the rotating arm 220 to support, the first rotating portion 230, which is provided at the end of the rotating arm 220 to rotate one of the pair of nozzle pipes 110A, 110B, and the rotating support base 210, The second shaft 240 is engaged with the motor shaft 244 to impart rotational force.

Rotating strut 210 is divided into upper and lower struts 212 and 214, the upper strut 212 is a structure that can be rotated relative to the lower strut 214, the outer peripheral surface of the upper strut 212 The gear 212a and the motor shaft 244 of the second rotating part 240 are formed in the mutually engaged structure.

In more detail, the rotating support base 210 has a gear 212a formed at a predetermined portion of an outer circumferential surface of the upper support base 212, and the gear 212a has a motor shaft 244 of the second rotating part 240. ) To engage with the structure.

In addition, the first rotating unit 230 is composed of a rod 232 and the cylinder 234, the rod 232 is moved forward and backward as the signal output from the control unit 400 is applied to one nozzle pipe (110A) The tension is rotated outward.

In addition, in the coupling structure between the first rotating part 230 and the one side nozzle pipe 110A, one end of the rod 232 is coupled to the outer surface of the one side nozzle pipe 110A, and the cylinder 234 is connected to the other end of the rod 232. ) Is connected.

More preferably, the link member 235 is interposed between the rod 232 and the cylinder 234 to increase the rotation angle angle of the one side nozzle pipe 110A according to the movement of the rod 232.

In other words, since the one side nozzle pipe 110A is rotated according to the movement of the rod 232, the rotation angle of the one side nozzle pipe 110A is proportional to the movement distance of the rod 232. .

In addition, the second rotating part 240 selectively opens and closes according to a signal from the controller 400 to rotate the upper support post 212 to rotate the rotating arm 220.

The reference numeral “310” indicates that the other nozzle pipe 110B senses the distance to the electrode 10 when the other nozzle pipe 110B rotates to the electrode 10 by the second rotating part 240 and outputs the same to the controller 400. It shows a proximity sensor installed on the inner side of the 110B, "320" is to detect the upper limit position of the electrode 10 during vertical movement of the support arm 40 and the support base 50 to output to the control unit 400 The position sensor, and "330" is installed on the electrode 10 detects the conduction sensor 330 to detect whether the electrode 10 is energized or non-energized and to output to the control unit 400.

Hereinafter, the action and effect of the present invention is as follows.

According to the present invention, after the energization sensor 330 and the position sensor 320 detect whether the state of the electrode 10 is in a non-energized state and is in an upright position, the controller 400 outputs it to the controller 400 so that the first control unit 400 may output the first. By outputting respective control signals to the rotating unit 230 and the second rotating unit 240, the nozzle pipes 110A and 110B are brought close to the lower end of the electrode 10 to undergo a series of processes for spraying cooling water.

When the control signal of the control unit 400 is applied to the first rotating unit 230, the cylinder 234 pulls the link member 235 to reverse the rod 232, and thus the nozzle pipe coupled to the rod 232. 110A is rotated outwardly about the hinge shaft 125 to open the gap with the other nozzle pipe 110B.

Subsequently, when the second rotating unit 240 is operated by the control signal of the control unit 400, the upper arm support 212 in which the motor shaft 244 of the driving motor 242 is engaged is rotated to rotate the rotating arm 220. The nozzle pipes 110A and 110B are rotated forward.

Subsequently, when the other nozzle pipe 110B is moved close to the lower end of the electrode 10, the proximity sensor 310 installed on the inner side detects this and outputs it to the controller 400. By stopping the drive motor 242 of the second rotating unit 240 to stop the rotation of the upper support (212).

When the other nozzle pipe 110B is moved close to the outer circumferential surface of the electrode 10, the control unit 400 outputs a control signal to the first rotating unit 230 again to return one nozzle pipe 110A to its original position and both sides. The nozzle pipes 110A and 110B surround the outer circumferential surface of the electrode 10.

Subsequently, when the on / off valve 150 is turned on in the control unit 400, the coolant having an appropriate pressure at an air pressure is supplied to the nozzle pipes 110A and 110B, and the coolant is supplied to the electrode 10 through the injection hole 115a. It is sprayed to the lower end side of the.

At this time, the air of the air supply pipe 140 is supplied to the cylinder 234 of the first rotating part 230 to operate the rod 232, and is supplied to the cooling water supply pipe 130 to provide an appropriate pressure to the cooling water. Done.

When the injection of the cooling water of the nozzle pipes 110A and 110B is completed, the controller 400 outputs a signal to the first rotating part 230 again to open the one side nozzle pipe 110A and then reverse the second rotating part 240. It has the reverse process of rotating and moving to the initial position.

This is to prevent the electrode 10 from interfering with the nozzle pipes 110A and 110B when the electrode 10 enters into the electric furnace 1 in the energized state.

In the above, the present invention has been described with respect to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the scope of the claims, which is common in the field to which the present invention pertains. Anyone with knowledge will be able to make various variations. For example, the first rotating unit 230 may employ a hydraulic cylinder or a solenoid valve instead of a pneumatic cylinder.

As described above, the present invention is to allow the nozzle pipe for spraying the coolant to move closer to the lower end of the electrode when the electrode of the electric furnace is in a non-conduction state and the upper limit position, so that the electrode is cooled when the electrode is not energized. Only by cooling the lower end of the electrode by using a mobile cooling means, not only can prevent the safety accident, but also has the effect of saving the material by preventing the consumption of the electrode material.

Claims (7)

Detecting whether the electrode 10 vertically movable on the upper side of the electric furnace 1 is in a non-electrical and upper limit position; Rotating the nozzle pipe on one side of the pair of nozzle pipes 110A and 110B rotatably moved left and right when it is determined that the electrode 10 is in the non-conduction state and the upper limit position; Rotating the open nozzle nozzles 110A and 110B to the position near the lower end of the electrode 10; Wrapping the one side nozzle pipe 110A and wrapping the nozzle pipe 110A to maintain a proper distance from the outer peripheral surface of the electrode 10; Compressing the cooling water at an appropriate pressure into the plurality of injection holes 115a formed in the nozzle pipes 110A and 110B on both sides and spraying the cooling water toward the electrode 10; When the injection of the cooling water is completed, the one side of the nozzle pipe (110A) after opening the step of rotating to move to the original position, and Mobile cooling method of the electrode comprising the step of controlling the operation of the nozzle pipe (110A, 110B) and the cooling water injection of the above steps to be repeatedly circulated in the control unit (400). An electrode holder 20 fixedly installed to hold an upper outer circumferential surface of the electrode 10 provided on the upper side of the electric furnace 1; A support arm 40 and a support base 50 extending from the electrode holder 20 to move the electrode 10 vertically; A spray pipe (30) fixedly installed below the electrode holder (20) to spray cooling water toward the electrode (10); Cooling means which is rotated so as to surround the lower end of the electrode 10 by rotation moving means when the electrode 10 is non-energized and in an upper limit position, and sprays coolant to the electrode 10 side; An energization sensor 330 and a position sensor 320 for detecting non-energization and position of the electrode 10, respectively; And a control unit 400 for receiving the signals output from the energization sensor 330 and the position sensors 320 to control the operations of the cooling means and the rotary movement means, respectively. . The pair of nozzle pipes (110A, 110B) of claim 2, wherein the cooling means has a plurality of injection holes (115a) formed on the lower side and is symmetrical with each other, and the distance between them is varied according to the signal of the controller (400). )Wow, Cooling water supply pipe 130 for supplying cooling water to the nozzle pipe (110A, 110B), An air supply pipe 140 for supplying air of an appropriate pressure to the cooling water supply pipe 130 to inject cooling water from the injection hole 115a toward the electrode 10; Removable cooling apparatus of the electrode, characterized in that provided with an opening and closing valve 150 for controlling the opening and closing of the cooling water supply pipe 130 and the air supply pipe 140 according to the signal of the control unit 400. According to claim 2 or 3, The rotary movement means is a hinge shaft 125 which is hinged to allow the rotation of the one side nozzle pipe (110A), The first rotating part 230 is integrally installed on the outer surface of the one side nozzle pipe 110A and rotates about one hinge pipe 110A by the signal of the controller 400 to rotate about the hinge shaft 125. Wow, A rotating arm 220 horizontally installed at ends of the nozzle nozzles 110A and 110B on both sides; Rotating support stand 210 and rotatably installed integrally with the rotary arm 220 and the gear 212a is formed on a portion of the outer peripheral surface, The mobile cooling device of the electrode, characterized in that it is provided with a second rotating part 240 that is meshed with the gear (212a) of the rotary support (210) and forward and reverse rotation according to the signal of the control unit (400). The method of claim 4, wherein the first rotating part 230 is a rod 232 coupled to the outer surface of the one side nozzle pipe (110A), And a cylinder (234) for rotating the one side nozzle pipe (110A) by moving the rod (232) forward and backward as the signal from the controller (400) is applied. 5. The movable cooling apparatus of claim 4, wherein the first rotating part (230) is provided with a link member (235) interposed between the rod (232) and the cylinder (234). The method of claim 4, wherein the second rotating part 240 is divided into the upper support post 212 so that the rotary support 210 is rotatable from the lower support 214, A plurality of gears 212a are formed on a portion of the outer circumferential surface of the upper support stand 212, One end is engaged with the gear 212a of the upper support stand 212, and a driving motor 242 for rotating the upper support stand 212 forward and reverse as the signal of the control unit 400 is applied. Mobile cooling apparatus of the electrode.