KR101082231B1 - Apparatus for spray nozzle for continuous casting - Google Patents

Abstract

The present invention relates to a spray nozzle apparatus for a continuous casting machine, in which a nozzle is clogged during continuous casting operation so that the nozzle can be quickly replaced when the coolant is not injected. A spray nozzle apparatus provided between adjacent guide rolls for guiding a spray nozzle, the spray nozzle apparatus being detachably connected to an air and a cooling water supply pipe supported on a base, the spray nozzle apparatus comprising: a rotating shaft rotatably provided to the base and the rotating shaft; Rotating device portion consisting of a rotating motor connected to the transmission; A pair of nozzle mounting portions having one end coupled to the rotary shaft so as to be lifted and lowered and the spray nozzle mounted at the other end, the pair of arms opposed to each other extending in a horizontal direction; A lifting device unit positioned between the base and the arm to raise and lower the arm; A position changing device unit for rotating the nozzle mounting unit about a horizontal axis to change the direction in which the spray nozzle is directed; It characterized in that it consists of a length-extension device for moving the clamp arm configured to separate the spray nozzle and the air and the cooling water supply pipe in the horizontal direction, by the burnout of the molten steel during the continuous casting process and by the stagnation of the air hose Sedimentation of the equipment is prevented due to fine spraying of the cooling water which may occur due to the separation of the spray nozzles, and the spray nozzles in the standby position at the time of closing the spray nozzles are automatically replaced immediately, thereby improving the cooling ability of the cast steel.

Continuous casting, spray nozzle

Description

Spray nozzle device for continuous casting machine {Apparatus for spray nozzle for continuous casting}             

1 shows a continuous casting process;

Figure 2 is a view showing a continuous casting machine equipped with a spray nozzle device in the continuous casting process, Figure 2a is a front view, Figure 2b is a side view;

3 is a view showing a conventional spray nozzle apparatus, Figure 3a is a front view, Figure 3b is a side view;

Figure 4 is a view showing a nozzle replacement apparatus according to the present invention, Figure 4a is a perspective view of the transmission, Figure 4b is a transmission front view, Figure 4c is a transmission plan view;

5 is a cross-sectional view showing a nozzle mounting portion and a nozzle pressure sensing unit according to the present invention;

6 is a cross-sectional view showing a position change device unit according to the present invention;

7 is a cross-sectional view showing a length-expanding device unit according to the present invention;

8 is a cross-sectional view showing a lifting device portion according to the present invention;

9A is a cross-sectional view showing a nozzle mounting portion and a position change device portion, a length-expansion device portion, a connection state between a base and an arm provided with the same according to the present invention;

9B is a view showing a connection state of the clamp arm and the supply flange of FIG. 9A;                 

10A is a cross sectional view of an air and coolant supply pipe and a supply flange extending from a base;

10b shows a side view of the connection of the supply flange;

Figure 10c is a side view showing the connection of the supply flange;

11 is a transmission front view showing a rotating device according to the present invention;

12 is a front view showing the operation of the spray nozzle apparatus according to the present invention;

Fig. 13 is an enlarged front view showing a part where the spray nozzle device according to the present invention is mounted;

14 is a flow chart showing a method of operating the spray nozzle apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10 ... spray nozzles, 100 ... nozzle mounts,

160 ... nozzle pressure sensing part, 200 ... positioning device part,

300 ... length extension unit, 380 ... clamp arm,

400 ... lift unit, 510 ... arm,

550 ... supply flange, 600 ... rotator section.

The present invention relates to a spray nozzle apparatus for a continuous casting machine, and more particularly, a spray nozzle for a continuous casting machine, in which a nozzle of the spray nozzle is clogged during continuous casting operation and thus cooling water is not injected, the nozzle can be quickly changed. Relates to a device.

Generally, spray nozzles are used to cool the castings during continuous casting operations. The continuous casting apparatus includes a tundish (3) for receiving the refined molten steel (1) supplied from the ladle (2) and a tundish (3) as shown in FIGS. 1, 2A, and 2B. Molding nozzle (4) for discharging molten steel (1), Mold (5) for molding molten steel (1) discharged from the immersion nozzle (4) into cast pieces 1 'of required dimensions, and molding in mold (5) It consists of a plurality of guide rolls 6 which guide the cast pieces 1 '. A spray nozzle 10 is provided between the guide rolls 6 for spraying and spraying cooling water.

Meanwhile, a nail chip (not shown) used for sealing a gap between the dummy bar and the mold 15 to prevent leakage of the molten steel 1 into the mold 15 at the beginning of casting. The spray nozzle 10 is blocked when sealing members, such as chips) and grinder chips (not shown) fall down and are accumulated between the guide rolls 6. As the spray nozzle 10 is blocked, there is a problem that the cooling water is not sprayed.

As shown in FIGS. 3A to 3B, the conventional spray nozzle 10 includes a spray nozzle part 11, a cooling water supply pipe 12 and an air supply pipe fastened with a screw 14 to the spray nozzle part 11. 13), even when the above-mentioned problem occurs, it is virtually impossible to replace the spray nozzle unit 11 while the continuous casting is in progress.                         

In the section in which the coolant is not sprayed, the slab 1 'is formed between the guide rolls 6 by the bulging phenomenon of the slab 1' due to the solidification delay, that is, the ferro-static pressure acting in the width direction. ) Swelling occurs. This bulging phenomenon caused internal defects or central segregation of the cast 1 '. When bulging occurs, the thickened steel in the solidification transition layer appears to be compressed. Since segregation is supplied with a lower concentration of molten steel after compacting molten steel, defects accompanied with segregation occur, which acts as a detrimental effect on the quality of the final product.

The present invention has been made in order to solve the conventional problems as described above, the spray nozzle in the standby position at the time of clogging the spray nozzle can be replaced automatically immediately to improve the cooling capacity for the cast steel It is an object to provide a spray nozzle apparatus for a casting machine.

In order to achieve the above object, the spray nozzle apparatus for a continuous casting machine according to the present invention is provided between adjacent guide rolls for guiding the cast pieces formed in the mold of the continuous casting facility, and the air and cooling water supply pipe supported on the base A spray nozzle device having a spray nozzle detachably connected to the spray nozzle device, the spray device comprising: a rotating shaft rotatably provided on the base and a rotating motor connected to the rotating shaft to enable power transmission; A pair of nozzle mounting portions having one end coupled to the rotary shaft so as to be lifted and lowered and the spray nozzle mounted at the other end, the pair of arms opposed to each other extending in a horizontal direction; A lifting device unit positioned between the base and the arm to raise and lower the arm; A position changing device unit for rotating the nozzle mounting unit about a horizontal axis to change the direction in which the spray nozzle is directed; Characterized in that it consists of a length-extension device for moving the clamp arm configured to separate the spray nozzle and the air and cooling water supply pipe in the horizontal direction.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a view showing a nozzle replacement apparatus according to the present invention, Figure 4a is a perspective view of the transmission, Figure 4b is a front view of the transmission, Figure 4c is a transmission plan view.

The spray nozzle 10 of the spray nozzle apparatus 1000 for continuous casting machines is provided in each place between the several guide rolls 6 in communication with the nozzle mounting part 100 to which cooling water is supplied, and spray-sprays cooling water.

The spray nozzle 10 is connected to the air and the coolant supply pipe 540 supported by the base 530 so as to be detachable.

One lower end of the base 530 is provided with a rotating device 600 provided to be rotatable.

The upper end of the rotating device 600 and the base 530 connected thereto is provided with a nozzle mounting portion 100, one end of which is coupled so as to be lowered and the other end, and the spray nozzle 10 is mounted on the other end, and in the horizontal direction. There is provided a pair of arms 510 opposite each other extending.

An elevating device unit 400 for elevating the arm 510 is provided between the arm 510 and the base 530.

On the arm 510 is provided a position change device 200 connected to the nozzle mounting portion 100 to rotate the nozzle mounting portion 100 about the horizontal axis to change the direction of the spray nozzle 10.

The other portion on the arm 510 is provided with a length-expansion device unit 300 for moving the nozzle mounting portion 100 in the horizontal direction to separate the spray nozzle 10 and the air and cooling water supply pipe 540.

The spray nozzle 10 'located in the standby state is directed in the opposite direction to the spray nozzle 10 in the operating state, and is located on the opposite arm 510' in which the spray nozzle 10 in the operating state is located, The configuration of the other members is as described above and share the rotating device 600.

5 is a cross-sectional view showing a nozzle mounting portion and a nozzle pressure sensing unit according to the present invention.

The lower end of the spray nozzle 10 is fixed to the nozzle fixing block 110, and a sealing O-ring 112 is provided at a lower end portion in direct contact with the nozzle fixing block 110. Inside the nozzle mounting unit 100, a supply flange 150 is formed coaxially divided into a supply pipe 158 for receiving air and coolant to be supplied, and the coaxial shaft of the supply flange 150 is a coolant supply line ( 154, the inner side is formed by the air supply line 156, and extends to abut the lower end of the spray nozzle 10. The nozzle pressure sensing unit 160 is configured at a lower end portion of the supply pipe 158 that is in contact with the spray nozzle 10. The nozzle pressure sensing unit 160 is fixed to the supply pipe 158 to fix the elastic member 162, the annular diaphragm 164 connected to be movable by the elastic member 162, and the elastic member 162. It consists of a fixed ring 166 and a pressure gauge 168 configured to communicate with it on one side of the air supply line 156. The annular diaphragm 164 is formed in correspondence with the outer side of the supply pipe 158, ie, the air supply line 156. When the diaphragm 164 is supplied with air, the diaphragm 164 is moved upward in the direction of the spray nozzle 10 by the pressure of the air so that the spray nozzle 10 and the air supply line 156 communicate with each other. When the spray nozzle 10 is blocked and the cooling water supplied from the cooling water supply line 154 flows back to the air supply line 156, the spray nozzle 10 moves downward in the opposite direction to the spray nozzle 10 by the pressure of the cooling water to supply air. Close line 156. One side of the air supply line 156 is in communication with the air supply line 156 is configured to the pressure gauge 168 is fixed to sense the pressure of the air supply line 156.

6 is a cross-sectional view showing a position change device unit according to the present invention.                     

The position change device unit 200 includes a rod 210 configured to allow reciprocating motion therein, a piston 220 configured at one end of the rod 210, and a space above and below the piston 220 from the outside to the inside. Pneumatic line 290 formed so as to communicate with each other, the rack bar 230 is fixed to the other end of the rod 210, the block 240, the teeth interlocking to the rack bar 230, the teeth formed in the block 240, Gear 250, which has a rotating shaft 260 that cooperates with the teeth formed. The air injected through the pneumatic line 290 allows the reciprocating motion of the piston 220, and the rod 210 also reciprocates. The rack bar 230 and the block 240 are reciprocated in accordance with the reciprocating motion of the rod 210, the teeth formed in the block 240 is configured to interlock with the gear 250 to convert the reciprocating motion into rotational motion do. Through the above-described process, the reciprocating motion of the piston 220 using the air pressure is converted into the rotational motion of the gear 250.

7 is a cross-sectional view showing a length-expanding device unit according to the present invention.

The length expansion and contractor unit 300 includes a rod 310 configured to allow reciprocating movement therein, a piston 320 configured at one end of the rod 310 to allow reciprocating movement by pneumatic pressure, and a piston 320. ) And a screw 370 configured to engage the rod 310, an elastic member 330 formed to move the piston 320 to maintain a relaxed state when the piston 320 is unloaded, and an elastic member 330. A cylinder head 340 formed to support one side of the rod 310 and penetrate the rod 310, and together with the cylinder head 340 to accommodate the rod 310, the piston 320, the elastic member 330, and the screw 370. The wiper seal provided on the side of the piston 320 to assist the reciprocating motion of the piston 320 at the portion where the configured cylinder 350 and the cylinder cap 360 and the cylinder 350 inner wall face and the piston 320 abut ( 312 and a portion through which the rod 310 of the cylinder head 340 passes to assist the reciprocating motion of the rod 310. One end of the configured wiper seal 322, the pneumatic line 390 and the piston 320 of the rod 310 formed in the space between the piston 320 and the cylinder cap 360 to communicate with each other The other end of the clamp arm 380, which is formed by being fixed in a "c" shape is composed of. When air pressure is injected through the pneumatic line 390, the piston 320 compresses the elastic member 330 and moves to the cylinder head 340. The rod 310 fastened to the piston 320 through the screw 370 moves in conjunction with the piston 320 to be moved by the displacement of the piston 320. The clamp arm 380 configured at one end of the rod 310 is also moved by the displacement of the piston 320. When the air injection to the pneumatic line 390 is stopped, the elastic member 330 is relaxed by the restoring force so that the piston 320 moves in the original position, that is, the direction of the cylinder cap 360, and the rod 310 and the clamp arm. 380 is also moved to its original position. Through the above-described process, the reciprocating motion of the clamp arm 380 using the air pressure is made.

8 is a cross-sectional view showing the lifting device unit according to the present invention.

The lifting device unit 400 includes a rod 410 configured to allow reciprocating motion therein, a piston 420 configured at one end of the rod 410 to enable reciprocating motion by pneumatic pressure, and a piston 420. And a screw 470 configured to engage the rod 410, an elastic member 430 formed to move the piston 420 to maintain the relaxed state when the piston 420 is unloaded, and the elastic member 430 A cylinder head 440 supporting one side and configured to penetrate the rod 410 and configured to accommodate the rod 410 and the piston 420, the elastic member 430, and the screw 470 together with the cylinder head 440. The wiper seal 412 provided on the piston 420 side to assist the reciprocating motion of the piston 420 at a portion where the cylinder 450 and the cylinder cap 460, and the inner wall surface of the cylinder 450 and the piston 420 meet each other. And a wa provided to assist the reciprocating motion of the rod 410 at a portion through which the rod 410 of the cylinder head 440 penetrates. The pneumatic seal 422 and the pneumatic line 490 formed in the space between the piston 420 and the cylinder cap 460 to mutually communicate with each other. When air is injected through the pneumatic line 490, the piston 420 compresses the elastic member 430 and moves in the direction of the cylinder head 440. The rod 410 fastened to the piston 420 through the screw 470 is moved in conjunction with the piston 420 to move by the displacement of the piston 420. The arm 510 supported at one end of the rod 410 is also moved by the displacement of the piston 420. When the air injection to the pneumatic line 490 is stopped, the elastic member 430 is relaxed by the restoring force so that the piston 420 is moved in the original position, that is, the direction of the cylinder cap 460, and the rod 410 and the arm ( 510 is also moved to its original position. Through the above-described process, the reciprocating motion of the arm 510 using the air pressure is made.

Figure 9a is a cross-sectional view showing a connection state between the nozzle mounting portion and the position change device portion, the length-expansion device portion, the base and the arm provided in accordance with the present invention, Figure 9b is a view showing a connection state of the clamp arm and the supply flange of Figure 9a to be.

The lower end of the spray nozzle 10 is fixed to the nozzle mounting part 100 located at one end of the arm 510 and moves in conjunction with the nozzle mounting part 100. The nozzle mounting unit 100 is connected to the rotation shaft 260 of the position change device unit 200 located at the tip of the arm 510 is configured to rotate the nozzle mounting unit 100 also when the gear 250 is rotated. The length-expansion device unit 300 located at the front end of the arm 510 has a clamp arm 380 configured at one end of the rod 310, and a supply flange connected to the supply flange 150 of the nozzle mounting unit 100 ( 550 is configured to be fixed. The supply flange 550 is connected to the base 530 through a bellows pipe 560 that expands when connected to the supply and demand flange 150 and contracts upon separation.

The clamp arm 380 configured at one end of the rod 310 bypasses the arm 510 so that the arm 380 extends beyond the end and is deflected toward the supply flange 550. The portion refracted toward the supply flange is formed with a “U” shaped groove to accommodate the diameter of the supply flange 550. Portions of the supply flange 550 and the supply and demand flange 150 that face each other are formed to have a step diameter larger than the diameter of the pipe.

Figure 10a is a cross-sectional view showing the air and cooling water supply pipe and the supply flange extending from the base, Figure 10b is a side view showing the connection of the supply flange, Figure 10c is a side view showing the connection of the supply flange.

The air and cooling water supply pipe 540 extending from the base 530 is configured as a cooling water supply line 544 inside the supply pipe 548 and a coaxial axis of the air supply line 546 on the outside. A portion of the supply pipe 548 constituting the cooling water supply line 544 is configured as an inner pipe bellows 541 to allow expansion and contraction of the supply pipe 546. The supply pipe 548 constituting the cooling water supply line 544 is coaxially accommodated therein, and a part of the air and the cooling water supply pipe 540 constituting the air supply line 546 is composed of an external bellows 543, and The expansion and contraction of the cooling water supply pipe 540 is possible.

The supply flange 550 is configured to face the supply and demand flange 150 by making a step with an outer diameter larger than the outer diameter of the air and cooling water supply pipe 540 at one end of the air and cooling water supply pipe 540. Grooves are configured on the surfaces of the supply pipe 548 and the air and cooling water supply pipe 540 opposite the supply flange 150 of the supply flange 550 to accommodate the sealing o-ring 552, respectively. The "+" type retainer 557 connects the air and cooling water supply pipe 540 and the supply pipe 548 coaxial to the supply flange 550 to expand and contract the inner pipe bellows 541 and the external bellows 543. The coaxial air and cooling water supply pipe 540 and the supply pipe 548 are configured to be synchronized.

The supply flange 150 is configured to face the supply flange 550 on one side of the nozzle mounting unit 100. The supply pipe 158 of the supply flange 150 is connected to the supply pipe 548 of the supply flange 550, and the cooling water supply line 154 and the air supply line 156 are connected to the supply flange 550 to supply the cooling water supply line. 544 and the air supply line 546, respectively. Grooves are formed on the surface of the supply flange 150 opposite to the supply flange 150 to accommodate the supply pipe 548 of the supply flange 550 and the sealing O-ring 552 of the air and cooling water supply pipe 540.

Each member in the standby state is the same as the configuration of each member in the above-described operating state.

11 is a transmission front view showing a rotating device according to the present invention.

The rotary unit 600 includes a sealed box 690, a boss 640 disposed in the sealed box 690 and fixed to the base 530, and a pneumatic line formed in the boss 640, and a bearing 650. And a rotation shaft 620 configured to be rotatable through the seal 642, a gear 630 configured at a lower end of the rotation shaft 620, and a gear configured to drive the gear 630 by being coupled to the gear 630. Means 610.

The configuration of the rotating device 600 is the same as the other known techniques and the technical idea.

Hereinafter, the operation of the spray nozzle device 1000 of the continuous casting machine which can be automatically replaced during operation according to the present invention.

12 is a permeable front view showing the operation of the spray nozzle apparatus according to the present invention, and FIG. 13 is an enlarged front view showing a part in which the spray nozzle apparatus according to the present invention is mounted.

As shown in FIG. 13, the spray nozzle apparatus 1000 according to the present invention is applied between a plurality of guide rolls 6 of a continuous casting machine.                     

Nail chip (not shown) used for sealing a gap between the dummy bar and the mold 15 to prevent the leakage of the molten steel (1) in the mold 15 of the initial casting And when the sealing member, such as a grinder chip, falls down and is deposited between the plurality of guide rolls 6 constituting the segment 60, the inside of the tip cap portion of the spray nozzle 10. When the coolant injection port is blocked to prevent the coolant injection, the coolant flows back to the air supply line 156 where the pressure is low, and when it is completely blocked, the diaphragm 164 is moved by the pressure of the reversed coolant. Supply line 156 is completely shut off and sensed by pressure gauge 168.

When the sensed measured pressure value exceeds the preset threshold pressure value, the solenoid valve S / V1 (not shown) of the position changer unit 200 'in the standby state is opened and the rod 210' and the piston when air is supplied. 220 'is moved and the rack bar 230' linked to the rod 210 'and the block 240' linked to the rack bar 230 'and toothed are also moved. The teeth formed in the block 240 'are rotated to mesh the gear 250' interlocked with the gear 240 'and the rotation shaft 260' of the gear 250 'is also rotated. The nozzle mounting portion 100 ′ linked to the rotating shaft 260 ′ is linked to the rotational movement of the gear 250 ′ and the rotating shaft 260 ′ so that the spray nozzle 10 ′ in the standby state is the spray nozzle 10 in the operating state. Will face in the same direction.

When this process is completed, after a predetermined time delay by the timer T1 (not shown), the supply of the coolant and the air is stopped, and the solenoid valve S / of the length extension device 300 on the arm 510 in the operating state is stopped. V2 (not shown) is opened and the rod 310 and the connected clamp arm 380 is moved when pneumatic is supplied to the length expansion and contractor unit 300 via the pneumatic line of the rotary shaft 620 through the boss 640. At this time, the inner pipe bellows 541 and the outer bellows 543 of the air and cooling water supply pipe 540 is returned to its original position by the restoring force, and the connection between the supply and demand flange 150 and the supply flange 550 is released.

When this process is completed, after a predetermined time delay by a timer T2 (not shown), the solenoid valve S / V3 (not shown) of the elevating device 400 is opened and the rod 410 and the elevating pressure are supplied. The arm 510 supported by the device 400 is raised. As the arm 510 is raised, the clamp arm 380 is completely spaced from the supply flange 550 (see FIG. 11).

When this process is completed, after a predetermined time delay by a timer T3 (not shown), the driving means 610 of the rotating device 600 is operated and the rotating shaft 620 is rotated by the rotation of the gear 630. The positions of the arm 510 in the operating state and the arm 510 'in the standby state are switched.

When this process is completed, after a predetermined time delay by the timer T4 (not shown), the solenoid valve S / V5 (not shown) of the elevating unit 400 'is opened and the pneumatic pressure in the cylinder 350' is discharged. The arm 510 'supported by the rod 410' and the elevating device 400 'is lowered by the restoring force of the elastic member 430'. As the arm 510 'is lowered, the "U" -shaped groove of the clamp arm 380' is placed in a position to receive the supply flange 550 '. At the same time, when the solenoid valve S / V4 (not shown) of the elevating device unit 400 that is replaced is also opened and the air pressure in the cylinder 350 is discharged, the rod 410 and the elevating device unit ( Arm 510 supported by 400 is lowered.                     

When this process is completed, after a predetermined time delay by the timer T5 (not shown), the solenoid valve S / V6 (not shown) of the length-expanding device 300 'on the arm 510' is opened and the pneumatic pressure is decreased. When discharged, the rod 310 'and the associated clamp arm 380' are moved by the restoring force of the elastic member 330 'and move to the supply flange 550, so that the inner tube bellows 541 of the air and coolant supply pipe 540 is moved. ) And the external bellows 543 are extended to tightly secure the supply and demand flange 150 'and the supply flange 550.

When this process is completed, after a predetermined time delay by the timer T6 (not shown), the supply of the coolant and air is resumed, and then the solenoid valve S / V7 (not shown) of the position changer unit 200 that has been replaced. Is opened and air is supplied, the rod 210 and the piston 220 are moved, and the rack bar 230 interlocked with the rod 210 and the block 240 interlocked with the rack bar 230 are also moved. Done. The teeth formed in the block 240 rotate with the gear 250 interlocked with the teeth, and the rotation shaft 260 of the gear 250 also rotates. The spray nozzle 10 in which the nozzle mounting part 100 interlocked with the rotating shaft 260 is replaced with the rotational movement of the gear 250 and the rotating shaft 260 is in a different direction from the replaced spray nozzle 10 '. It is placed in the state and the replacement is completed.

14 is a flowchart illustrating a method of operating the spray nozzle apparatus according to the present invention.

When the spray nozzle 10 is clogged and the pressure rises, the pressure gauge 120 is operated (S1), and the measured pressure measured from the pressure gauge 120 is compared with a preset threshold pressure ( S2), and configures a comparison step in which the pressure of the cooling water supplied to the spray nozzle 10 is measured and collected in real time and compared with a predetermined threshold pressure value.

 When the measured measured pressure is lower than the critical pressure, the operation continues without replacing the spray nozzle 10 (S3), and when the measured pressure is high, the process proceeds to the operation stage of the position change device 200 '(S4), When the measured value is lower than the set threshold pressure value, the spray nozzle 10 continues to operate without replacement, and when the measured value is higher than the threshold pressure value, the spray nozzle 10 'is placed at the standby position through the position change device 200'. The position of) constitutes the start step in which the conversion is made.

After a predetermined time delay by the timer T1 (S5), the inflow of air and cooling water from the base 530 to the nozzle mounting unit 100 is blocked (S6), and the operation of the length-expanding device unit 300 described above proceeds. (S7), after a predetermined time delay by the timer T2 (S8), the above-mentioned lifting device unit 400 is operated (S9), so that the inflow of the coolant from the base 530 to the nozzle mounting unit 100 is blocked. Completion and the lifting operation of the lifting device unit 300 ′ constitutes a separation step in which the nozzle mounting unit 100 and the air and cooling water supply pipe 540 are completely separated.

After a predetermined time delay by the timer T3 (S10), the driving means 610 of the rotating device 600 is operated to switch the position of the arm 510 in the operating state and the arm 510 'in the standby state. (S11), the rotating device 600 is operated to configure a switching step in which the positions of the spray nozzles 10 'to be replaced and the positions of the spray nozzles 10 to be replaced are converted.

After a predetermined time delay by the timer (T4) (S12), the arm 510 'is lowered by the operation of the above-mentioned lifting device 400' (S13), by the operation of the replaced lifting device 400 The arm 510 is lowered (S14), and after a predetermined time delay by the timer T5 (S15), the clamp arm 380 'is moved by the operation of the above-mentioned extension device 300' and is supplied. The flange 550 is also moved so that the supply and demand flange 150 'and the supply flange 550 are closely fixed to each other (S16), and supply of air and cooling water from the base 530 to the nozzle mounting portion 100' is resumed (S17). , And constitutes a fastening step in which the supply and demand flange 150 'and the supply flange 550 are fastened.

After a predetermined time delay by the timer T6 (S18), the replaced position changing device 200 is operated to place the replaced spray nozzle 10 in the standby state (S19), and the replaced spray nozzle 10 ) To convert the position of) to configure the completion step to be located in the standby position.

As described above, according to the present invention, a spray having a spray nozzle provided between adjacent guide rolls for guiding the molded pieces in a mold of a continuous casting facility and detachably connected to the air and the cooling water supply pipe supported on the base A nozzle device, comprising: a rotating device portion formed of a rotating shaft rotatably provided on the base and a rotating motor connected to the rotating shaft to enable power transmission; A pair of nozzle mounting portions having one end coupled to the rotary shaft so as to be lifted and lowered and the spray nozzle mounted at the other end, the pair of arms opposed to each other extending in a horizontal direction; A lifting device unit positioned between the base and the arm to raise and lower the arm; A position changing device unit for rotating the nozzle mounting unit about a horizontal axis to change the direction in which the spray nozzle is directed; A spray nozzle device for a continuous casting machine, characterized in that it consists of a length-extension device for moving the clamp arm configured to separate the spray nozzle and the air and the cooling water supply pipe in a horizontal direction. Cooling capacity of the cast steel is prevented by sedimentation of the equipment due to unsprayed cooling water, which may occur due to the disconnection of the spray nozzle due to the burnout of the hose. Can improve.

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.

Claims (4)

A spray nozzle apparatus having a spray nozzle provided between adjacent guide rolls for guiding molded pieces in a mold of a continuous casting facility and detachably connected to air and cooling water supply pipes supported on a base, A rotating device unit including a rotating shaft rotatably provided on the base and a rotating motor connected to the rotating shaft to enable power transmission; A pair of nozzle mounting portions having one end coupled to the rotary shaft so as to be lifted and lowered and the spray nozzle mounted at the other end, the pair of arms opposed to each other extending in a horizontal direction; A lifting device unit positioned between the base and the arm to raise and lower the arm; A position changing device unit for rotating the nozzle mounting unit about a horizontal axis to change the direction in which the spray nozzle is directed; Spray nozzle device for a continuous casting machine, characterized in that consisting of a length-extension device for moving the clamp arm configured to separate the spray nozzle and the air and cooling water supply pipe in the horizontal direction. The method of claim 1, A nozzle pressure sensing unit provided to the spray nozzle to measure the pressure of the coolant supplied from the air and the coolant supply pipe; And a control unit connected to the nozzle pressure sensing unit to enable signal transmission and controlling the operation of the rotating unit, the elevating unit, the position changing unit, and the expansion and contraction unit. Device. The method of claim 2, The nozzle pressure sensing unit, An elastic member; An annular diaphragm connected to be movable by the elastic member; A fixing ring configured to be fixed to the supply pipe to fix the elastic member; Spray nozzle device for a continuous casting machine, characterized in that consisting of a pressure gauge configured to communicate with one side of the air and cooling water supply pipe. The method of claim 1, The elevating device portion and the length stretching device portion, A rod configured to reciprocate therein; A piston configured at one end of the rod to enable reciprocating motion by pneumatic pressure; A screw configured to engage the piston with the rod; An elastic member configured to move the piston to maintain the relaxed state when the piston is unloaded; A cylinder head supporting one side of the elastic member and configured to penetrate the rod; A cylinder and cylinder cap configured to receive the rod and the piston, the elastic member and the screw together with the cylinder head; A wiper seal provided on the piston side to assist the reciprocating motion of the piston in a portion where the cylinder inner wall surface and the piston meet each other; A wiper seal provided to assist a reciprocating motion of the rod in a portion through which the rod of the cylinder head passes; Spray nozzle device for a continuous casting machine, characterized in that each consisting of a pneumatic line formed so that the interior and the outside communicate with each other in the space between the piston and the cylinder cap.

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