JPH02280959A - Apparatus for automatically exchanging nozzle in molten steel ladle - Google Patents

Abstract

PURPOSE:To automate handling of a nozzle in a molten steel ladle by fitting the cylindrical jig into a collector nozzle case using L-shape groove after positioning an apparatus, then rotating a cylindrical jig to release engaging with exchange nozzle fitting side and retreating the apparatus to the original position. CONSTITUTION:A frame table H constituted freely liftable and shiftable forth and back and in the right angle direction for automatic copying function suiting to the exchanging apparatus of the collector nozzle, is arranged. In this frame table, a supporting body 18 constituted as rotatable to two directions of front/ rear and right/left for automatic copying function, is arranged. The guides 20 fitted to the exchange nozzle fitting side at the time of advancing at the front part of this supporting body 18 and the cylindrical jig 19 having L-shape groove for engaging with this exchange nozzle on the outer circumference thereof and constituted as rotatable and possible to advance/retreat are arranged. By this method, the automatic handling of the nozzle for the molten steel ladle, which is high temp. and heavy material, can be achieved, and efficient, safe and rapid work can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic exchange device for a molten steel ladle nozzle, such as a rotary nozzle or a sliding nozzle, which is attached to the bottom of a molten steel ladle used in a steel factory.

[Conventional technology]

In the steelmaking factory, as shown in FIG. 29, a molten steel ladle B is placed on a ladle truck 80 for receiving and taking molten steel coming out of the tilted converter A.

At the bottom of this molten steel ladle B, there is a rotary nozzle or sliding nozzle R (hereinafter referred to as
These are also called "molten steel pot nozzles").

In the case of the rotary nozzle R, as shown in the longitudinal sectional view of FIG. 31, the collector nozzle 11 is made of refractory brick.
Slide plate 9, fixed plate 10, upper nozzle 12
It consists of P indicates a flow path for molten steel opened in these refractories; in other words, the upper nozzle 12 injects mortar into a tapered opening 14a opened in the lining refractory 14 installed in the bottom shell 13 of the molten steel ladle B. Attached via M,
The fixed plate IO and the slide plate 9 in contact therewith are provided on the inner door 11 and outer door 4 sides, respectively, which are pivotally attached to the outside of the pot bottom iron skin 13. A collector nozzle 1 is attached to a collector nozzle 2 via mortar M, and this case 2 is fitted to a rotor (rotating frame) 3. The rotor 3 is held within the outer door 4 via a ball bearing 5 and a compression spring 6.

The compression spring 6 is used to apply surface pressure to the contact surface between the slide plate 9 and the fixed plate 10 via the rotor 3.

Molten steel flow rate control in the rotary nozzle R having such a structure is achieved by rotating the collector nozzle 1 and the slide plate 9 by rotating the rotor 3, and by rotating the upper nozzle 1.
In the figure, one of the two collector nozzles 1 is a reserve. Although not shown, in the case of a sliding nozzle, the flow rate is controlled by sliding the slide nozzle together with the collector nozzle in the lateral direction (direction along the bottom of the V4) to control the flow path area. There is.

The upper nozzle 12, fixed plate 1-10, slide plate 9, and collector nozzle 1 are all made of brick, which is a refractory material. Therefore, it is necessary to replace these refractories (also referred to as replacement items) that constitute the rotary nozzle R hot (online) with a certain frequency. be. In addition,
In this specification, the molten steel ladle B, the outer door 4, the inner door 11, the rotor 3, etc. are also referred to as the replacement mounting side.

At the time of replacement, the molten steel ladle B is lifted up by a crane and placed on the ladle head turning machine 77, as shown in FIG. In this state, the bottom of the molten steel pot B is located in a recess 79 below the level of the floor 78.
The molten steel ladle B
When it is rotated 90' and the bottom is brought to the horizontal position, it will be at a height position from the floor 78 that makes it easy to replace the row nozzle R. Such a pot head turning machine 77
A plurality of ladle B are installed side by side in the factory because molten steel ladle B is transported one after another for refractory replacement. In addition, in the case of the present invention to be described later, an exchange cart 74 is provided beside these pot head turning machines 77.
A running rail 76 is laid (FIG. 28).

To replace (remove) the rotary nozzle R, first remove the collector nozzle L along with the case 2 in the state shown in FIG. In the double-opening state, remove the slide plate 9 and the fixed plate 10, and finally pull out the upper nozzle 12 from the molten steel ladle B. Then, attach it to the new molten steel ladle nozzle by reversing the procedure. These molten steel ladle nozzles may all be replaced at the same time, or only some (for example, collector nozzle 1) may be replaced.

Conventionally, the above-mentioned molten steel ladle nozzle replacement work has been carried out manually (2
IJ[.

The current situation is that However, since the upper nozzle 12 requires a pulling force of about 30,
As seen in Japanese Utility Model Publication No. 29865 and Japanese Utility Model Publication No. 51-33855, devices for mechanically performing the pulling operation have been proposed.

[Problem to be solved by the invention]

The weight of the replacement parts that make up the molten steel ladle nozzle is 2
It weighs approximately 0 to 50 kg, and it is hard work for one person to carry it around.Also, replacement work is done frequently (normally, a molten steel pot is brought in for replacement every 30 minutes), so it requires a lot of effort on the part of the worker. It is a heavy burden, and since it has to be done hot, quick work is required.
It is dangerous because it involves handling heavy objects (at temperatures of 30°F (°C)), and since the installation of the molten steel ladle nozzle is done based on human intuition, there is a problem that the installation force is not constant.

On the other hand, regarding the upper nozzle extraction device described in the above publication, the former is a simple one that uses impact force, and the latter uses hydraulic pressure, and its positioning etc. Automation of the exchange process is difficult to achieve because of the difficulty.

Therefore, in the present invention, an exchange device suitable for each of these objects to be exchanged is developed to achieve automation of the work and save labor and manpower.

In this specification, the direction of moving back and forth in the direction of the arrow toward the bottom of the molten steel ladle in FIGS.

[Means to solve the problem]

The first invention is suitable for a collector nozzle replacement device, and its gist is that a frame configured to be movable up and down, forward and backward, and movable in right angle directions for an automatic copying function is provided so as to be movable back and forth; For this purpose, a support body is provided which is rotatable in two directions, front, back, left and right, and a guide is provided on the front part of the support to fit with the side on which the replacement item is attached when moving forward, and an L-shaped groove is provided on the outer periphery for engagement with the replacement item. An automatic molten steel ladle nozzle changing device is characterized in that it is provided with a cylindrical jig configured to be rotatable and movable back and forth.

The second invention is suitable for a fixed plate and slide plate exchanging device, and its gist is that it has a guide at the tip that fits on the side where the replacement item is attached when moving forward, and can move up and down freely due to the automatic tracing function, and can move forward and backward at right angles. A pedestal is provided that is movable in the direction of
This mount has a positioning bracket that has a guide at its tip that fits with the side where the replacement item is mounted when moving forward, and is configured to be movable in the forward and backward directions and rotatable in two directions, front and back, right and left, for automatic copying function. An automatic molten steel ladle nozzle changing device is provided so as to be movable in the forward and right angle directions, and the positioning bracket is provided with a gripping means and a loosening means for the replacement object.

The third invention is suitable for an upper nozzle replacement device, and its gist is that a pedestal is provided that can move forward and backward, and is configured to be movable up and down, forward and backward, and movable in right angle directions for the automatic copying function. For this purpose, a support body is provided which is rotatable in one direction forward and backward, and a guide that fits with the side on which the replacement item is mounted when moving forward, a stopper that abuts, and a draw rod that can move forward and backward are provided protruding from the front part of the support body. The automatic molten steel ladle nozzle changing device is characterized in that a locking means configured to be able to protrude from the drawing rod is installed at the tip of the drawing rod.

[Effect]

In the above configuration, when the device moves forward and fits the guide to the side where the replacement object is attached, the automatic copying function works, and the posture of the device is changed to 3 or 4 in total in up/down, left/right, and one or two rotational directions.
The positioning of the device is facilitated by changing the position with two degrees of freedom.

Further, in the first invention, after the cylindrical jig is engaged and fitted to the collector nozzle case using the L-shaped groove, the cylindrical jig is rotated to release the engagement with the replacement object mounting side, and then the device is installed. When the collector nozzle is moved back to its original position, the collector nozzle and the case are removed from the side where the replacement item is installed.

In the second invention, the entire device is advanced to fit the guide to the bottom of the molten steel ladle, and the positioning bracket is further advanced in a direction perpendicular to this to fit the guide to the replacement object mounting side to perform positioning. The gripping means provided on the positioning bracket is activated to grasp the fixed plate or slide plate that is the object to be replaced, and after loosening the fixture that fixes it, the positioning bracket is moved back to its original position. The plate is removed from the replacement mounting side.

In the third invention, the guide is fitted to the replacement object mounting side and the stopper is brought into contact with the guide in the same manner as described above. Then, after advancing the drawing rod and inserting it into the upper nozzle which is the object to be replaced, the locking means is projected. Then, when the drawing rod is moved back, the locking means is caught on the upper nozzle, and the above-mentioned stopper and guide act as a tension. As a result, a pulling force is applied to the upper nozzle and it is pulled out from the side where the replacement item is attached.

When installing a new fI4 pot nozzle (replacement) in a predetermined position, the same procedure as above or the reverse operation may be performed as necessary.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

A) First invention (collector nozzle replacement device): Prior to explaining this device, the structure of the collector nozzle installation will be explained.

As shown in FIG. 33, the collector nozzle 1 is fitted into a cylindrical collector nozzle case 2, and this case 2 has an engaging pin 2a and a detachable pin 2b protruding from three locations on the outer periphery. ing. The attachment to the rotor 3 is the 34th
As shown in the figure, after inserting the retaining pin 2a straight in the direction of the arrow along the L-shaped groove 3a provided on the rotor 3 side, the locking pin 2a is inserted into the groove 3a by rotating the collector nozzle case 2 in the direction of the arrow. Move it along the vertical part and lock it. To remove the collector nozzle 1 from the rotor 3 together with the case 2, it is sufficient to perform a reverse operation. Note that the rotor 3 is connected to the outer door 4.
As shown in FIG. 31 mentioned above,

To explain the collector nozzle exchange device, FIGS. 1 and 2 are a side view and a front view thereof, and pillars 17a are erected on left and right support stands 16 forming a frame H. A straight support body 18 is pivotally supported on this support column 17a, and two cylindrical jigs 19 (upper and lower) are provided on the front (front) side of the support body 18, guides 20 are placed on both sides of the center, and stoppers 21 are provided at diagonal positions.
is installed protrudingly. In this embodiment, two cylindrical jigs 19 are provided in accordance with the number of collector nozzles 1 to be replaced, but if only one collector nozzle 1 is to be replaced, only one cylindrical jig 19 needs to be provided.

Note that even when two cylindrical jigs 19 are installed as shown in FIG. 1, it is possible to replace only one collector nozzle 1 by operating only one cylindrical jigs 19.

The support stand 16 is equipped with a guide 22 and a guide/up/down copying stopper 23 at the front and rear, and a lifting means 24 at the center thereof.
Supported by These guides 22, 23 and lifting means 24 are erected on an intermediate stand 25. Intermediate stand 25
A rail guide 26 for movable in the forward and backward orthogonal directions is provided at the lower part of the frame, and is slidably engaged with a horizontal rail 28 laid on a base 27. 29 is the frame H
This is a horizontal copying stopper. A forward and backward movement cylinder 30 is disposed at the end of the base 27. A rail guide 32 is provided at the bottom of the base 27, and is slidably engaged with front and rear rails 31 laid on an exchange cart (not shown).

In this way, the pedestal H consisting of the support stand 16, intermediate stand 25, base 27, etc. is movable forward and backward by the operation of the forward and backward movement cylinder 30, and is also movable up and down due to the automatic tracing (alignment) mechanism described later. It is movable in forward and backward directions.

The cylindrical jig 19 has L-shaped grooves 19 fixed to the front end of the advance/retreat shaft 33 at three locations in the circumferential direction, as shown in FIGS. 3 and 4.
It is formed of a cylindrical body 19A having a. The rear end of the advance/retreat shaft 33 is connected to the rod side of the protrusion cylinder 34. The reciprocating shaft 33 is slidably fitted into a rotating cylinder 35 provided with a relatively long keyway 33a via a key 33b that engages with the keyway 33a. A drive gear 36 that meshes with a gear 35a formed at the rear end of the rotation tube 35 is connected to a jig rotation motor 37.
5. The drive gear 36 and the like are housed inside the support body 18.

Note that 38 indicates a bearing.

In this way, the cylindrical jig 19 can move forward and backward by the operation of the ejection cylinder 34 and the jig rotation motor 37, and
It is configured to be rotatable. In addition, the cylindrical jig 19 includes
As shown in FIG. 5, means is provided for forming an allowance δ in the circumferential direction in consideration of misalignment between the support and removal of the replacement product. That is, the appropriate interval in the circumferential direction of the cylinder 19A (
60@pitch is appropriate), the opening 39 and this opening 3
A storage groove 41 is formed by a closing plate 40 having a U-shaped cross-section and closing the groove 9 from the outside. A spring 42 and a ball 43 abutting the spring 42 are provided in this storage groove 41.

Therefore, the ball 43 may sink into the storage groove 41 due to the application or removal of a certain pressure from a replacement object or the like from within the cylinder 19A, or the ball 43 may sink into the storage groove 41 due to the elastic force of the spring 42, or may be pushed out from the inner surface of the cylinder 19A by δ.
With this configuration, as shown in Fig. 15, if the replacement item (case 2 including collector nozzle 1) is not misaligned when the replacement item (case 2 including collector nozzle 1) is held The ball 43 protrudes into the cylindrical body 19A as shown in Figure (a) and is held without any looseness. ), it is possible to absorb this deviation.

As shown in FIG. 6, on the replacement mounting side (rotor 3 side in this case), there are mounting holes 2A for the collector nozzle 2 on the top and bottom, and guide holes 20A on the left and right sides. As shown in FIG. 7, a tapered lead-in portion 20a is formed at the open end of the guide hole 2OA so that the guide 20 can be easily inserted even if the guide 20 is misaligned with the guide 2o.

By the way, this exchanger is provided with an automatic copying (II core) mechanism for the following reason. That is, when replacing the molten steel ladle nozzle, the pedestal H is advanced, the guide 20 is fitted into the guide hole 20A (Fig. 7) provided on the side where the replacement item is installed, and the device is positioned with the stopper 21 in contact with the side where the replacement item is installed. The process is completed (see Figure 8), but at this time, the replacement item (installed side) is not always in a fixed position, so as the guide 20 enters the guide hole 2OA, the posture of the pedestal H needs to change to follow the counterpart. There is (imitative action). However, when the pedestal H is removed from the replacement object mounting side after the work is completed, it is necessary to return to the original reference position (returning action). If it does not return to the original reference position, a large misalignment will occur between the replacement item (installed side) and the guide 20 will not be able to fit into the guide hole 2OA during the next replacement work, and the positioning of the device will become difficult. This is because there is no longer any room for the automatic copying function to work.

First, the basic structure of the vertical automatic copying mechanism of the gantry H will be explained with reference to FIGS. 9 to 1O. 1st
In FIG. 0, a lifting means 24 consisting of a hydraulic or air cylinder provided at the lower part of the support base 16 is set so that a cylinder pressure P somewhat greater than the weight W of the base is applied. Therefore, normally (before use), the elevator 24a is at the reference position at the upper end (stroke end) of the cylinder (see Figure (a)).
). Therefore, for example, when the pedestal H moves forward toward the replacement object mounting side and the guide 20 is inserted into the guide hole 2OA on the replacement object mounting side located slightly below this (the 8th
(Fig.), a downward forcing force acts, and the elevator 24a is forcibly lowered downward against the cylinder pressure P ((b)
(see figure). In this way, the pedestal H moves downward. Then, when the guide 20 leaves the guide hole 2OA, the cylinder pressure P overcomes the gantry weight W, and the elevator 24a returns to the upper end of the cylinder (Fig. On the other hand, when the guide 20 is inserted into the guide hole 2OA slightly above this, an upward forcing force acts, and the support base 16 moves upward while being guided by the elevator 24a, and the pedestal H also moves upward. It moves by following the pattern (Figure (C)). When the guide 20 is detached, the mount H
Due to its own weight, the state shown in figure (C) returns to the state shown in figure (a). In this way, when the apparatus is not in operation, the gantry H1 cylindrical jig 19, guide 20, etc. are always at the reference position. This prevents a large misalignment from occurring with respect to the guide hole of another molten steel ladle.

In the configuration shown in FIG. 10, the elevating means 24 serves both as support for the gantry and as an automatic copying means, and when the gantry H moves upward (the state shown in FIG. It will support all the weight. Therefore, in order to avoid this, a configuration as shown in FIG. 9 can be considered. That is, vertical copying stoppers 23 made of hydraulic or pneumatic copying cylinders 23a are provided on both sides of the support base 16. Separately from this, a support cylinder 24 for supporting the pedestal is provided.

The pressure P of this support cylinder 24 is set to a pressure approximately equivalent to the weight W of the pedestal.Normally, the pressure P in the support cylinder 24 is as shown in FIG. The elevator 24a is located at the middle position of the cylinder 24, and both copying cylinders 23a are at their stroke ends.

When the pedestal H moves downward in this state, it pushes down the elevator 24a and at the same time moves the lower copying cylinder 23a.
(Fig. (b)), and when the pedestal H moves upward to copy, the support base 16 rises and the elevator 24a also rises as shown in Fig. (C), while the copying cylinder 23a located above is pushed down. Push it in. At this time, the load of the gantry H is always supported by the support cylinder 24, so the guide 20 only needs to support the pressure P' of the copying cylinder 23a.
Since the pressure P1 of the copying cylinder 23a may be small, a large force is not applied to the guide 20. guide 20
When the support base 16 is removed from the guide hole 2OA, the pressure P° returns the support base 16 to the original reference position shown in FIG.

Furthermore, instead of the copying cylinder 23a, a coil spring 23a may be used as in the embodiment shown in FIG. 1 to achieve the same function.
are erected and inserted through the support stand 16, and coil springs 23a are attached above and below with the support stand 16 in between. If the stop 23c provided at the end of the guide rod 23b is configured with a nut that is screwed onto the guide rod 23b, rotating the stopper 23c will reduce the elastic force of the coil spring 23a (the above-mentioned copying cylinder). 23a pressure P.

(equivalent to) can be adjusted.

The lateral copying mechanism of the pedestal H is shown in Figures 12 and 13.
As shown in the figure. A horizontal scanning stopper 29 is disposed on the base 27, and the tip of the rond at the stroke end of the stopper 29 is in contact with an abutment member 25a hanging downward from the intermediate base 26. This horizontal scanning stopper 29 functions to always return the gantry H to the reference position. The mechanism in this respect is similar to the above-mentioned vertical copying mechanism.

Although the automatic copying mechanism of the pedestal has been described above, the support body 18 pivotally supported by the pedestal is also provided with similar mechanisms in two rotational directions: front, rear, left, and right.

FIG. 11 shows a rotary copying mechanism in the front-rear direction.

In FIG. 11, a counterweight WT is attached to the support body 18 as necessary so that the head of the support body 18 becomes heavy. Normally, as shown in Figure (a), the support column 17 is rotated by a longitudinal rotation stopper (copying cylinder) 17 provided on the support body 18 side.
a is pressed to support the support support 18 and hold the support body 18 at a reference position (approximately horizontal position). In other words, the pressing force of the copying cylinder 17 and the force due to the pivoting moment of the support body 18 are set in a balanced state. In this state, the support body 18 moves forward and the guide 20 moves slightly downward into the guide hole 20.
When inserted into A (Fig. 8), the support 18 rotates slightly around the support shaft 17b against the pressing force of the copying cylinder 17, and the copying cylinder 17 is pushed in (Fig. 8). ). From this state, the guide 20 is aligned with the guide hole 2OA.
Figure (a) shows that the pressure of the copying cylinder 17
Figure (C), in which the support body 18 reversely rotates and returns to the position shown in FIG. When the support body 18 leaves the guide hole 20A, the head of the support body 18 is heavy, so the support body 18 automatically returns from the position shown in Figure (C) to the position of Figure (A).

FIG. 12 shows the left-right rotational copying mechanism.

The support shaft 17b of the support body 18 is pivotally supported by the pillars 17 on both sides via spherical bearings 17c. Therefore, the support body 18 can freely rotate not only back and forth but also left and right. For example, if the support body 18 rotates in the direction of the arrow when the guide 20 is inserted into the guide hole 2OA as shown in FIG. Figure (b)). At the same time, the support stand 16 moves laterally. When the guide 20 is removed from this state, the left and right supports 16 return to their reference positions due to the action of the above-mentioned upper and lower copying mechanisms 23, and the supports 18 also return to their original positions as shown in Figure (a).

(Collector nozzle replacement work) Before starting the replacement work, first
0 (Fig. 1) to move the frame H forward, as shown in Fig. 8, the upper and lower stoppers 21 are brought into contact with the rotor 3 side,
At the same time, the guide 20 is inserted into the guide hole 2OA to position the device. At this time, the automatic tracing (alignment) function of the device is activated, and even if there is some misalignment between the two, the device moves to follow it. Next, the ejection cylinder 34
(Fig. 3), extend the cylindrical jig 19, and attach the L of the cylindrical jig 19 to the attachment/detachment pin 2b of the collector nozzle case 2.
Engage the mold groove 19a. In this case, the cylindrical jig 19 is rotated as necessary to fit the attachment/detachment pin 2b.
When there is a misalignment between the cylindrical jig 19 and the collector nozzle l which is the object to be replaced, the ball 43 provided in the cylindrical body 19A of the cylindrical jig 19 will move against the spring 42 as shown in FIG.
This misalignment can be easily absorbed because it is retracted into the storage groove 41 against the urging force of , and is provided with an escape allowance.

Next, the cylindrical jig 19 is rotated by the jig rotation motor 37 to move the engaging pin 2a of the collector nozzle case 2 to the rotor 3.
After separating from the L-shaped groove 3a (reverse operation in Fig. 34),
The ejection cylinder 34 is operated (contracted) to remove the cylindrical jig 19.
When the collector nozzle 1 is moved back, as shown in Fig. 34,
is removed from the rotor 3 together with its case 2 (first
(See Figure 4). After this, the forward/reverse cylinder 30 is retracted to return the gantry H to its original position, and a replacement trolley (not shown) is driven to the new parts storage area, where the old and new collector nozzles are replaced, and then the process is repeated in the same manner as described above. The operation is performed to attach the case with the new collector nozzle to the rotor 3.

B) Second Invention (Fixing Plate and Slide Plate Exchange Device) To explain the mounting structure of the slide plate and the fixed plate, the slide plate 9 and the fixed plate 10 (also simply referred to as plates) are shown in FIG. As shown in FIG. 36, they are fixed to the outer door 4 and inner door 11 in the same manner. That is, both sides of the plate 9 (10) are cut off in a straight line S, and the taper shim 7 is sandwiched between this and the taper member 7a on the door 4 (11) side. Then, as the Taber shim 7 is screwed into the door 4 (11) with the bolt 8, the Taber shim 7 enters like a wedge, and the plate 9 (10) moves toward the center. When this is done from both sides, the plate 9 (10) is fixed to the door 4 (11)'. When replacing these slide plates 9 and fixed plates 1O, as shown in Figure 32, the outer door 4 and inner door 1 are replaced.
1 into a double-folded state.

Next, the exchange device for these plates is shown in Figure 16 (side view).
, will be explained with reference to FIG. 17 (front view).

In the figure, components equivalent to those described in the above-mentioned exchange device are designated by the same reference numerals, and functional description thereof will be omitted.

In the figure, a rail guide 32 is provided at the bottom of the base 27 and slides by engaging with the front and rear rails 31 laid in the front and rear direction (usually on an exchange cart (not shown)), and the end of the base 27 A forward/reverse cylinder 30 is connected to the cylinder.

A lateral rail 28 is laid laterally on the base 27, and a rail guide 26 that engages with and slides on the lateral rail 28 is provided at the lower part of the intermediate pedestal 25. A guide 20', which also serves as a stopper, is protruded from the front surface of the intermediate stand 25. Also, intermediate stand 2
5 has a lifting means 24 for supporting the support base 16, and a guide 22 and a guide/up/down copying stopper 2 on both sides thereof.
3 are arranged. Reference numeral 29 indicates a horizontal scanning stopper, and the specific structure and function thereof are the same as those described above. It is also the same as above that the mount H is composed of the base 27, the intermediate stand, the support stand 16, etc. as described above.

Rails 54 are laid on the support stand 16 in the front and rear.
The auxiliary stand 5 is connected to this via a slidable rail guide 54A.
3 is provided. Front and rear copying stoppers 29° are provided at the front and rear of the auxiliary stand 53. Further, a rail 51B is laid on the upper surface of the auxiliary stand 53 in the forward and backward orthogonal direction, and the movable stand 51 is provided on this rail via a slidable rail guide 51A. A moving cylinder 52 is connected to the end of the moving table 51, and its operation allows the moving table 51 to move in the forward and backward directions at right angles. As shown in FIG. 17, a support bracket 48 having a spherical bearing 48a is erected on top of the movable table 51. A shaft 45 is supported. At the rear end of the support shaft 45, there is a longitudinal rotation stopper 50 (the above-mentioned 17) composed of a cylinder.
) is provided on the gate frame 49, and always presses the support shaft 45 downward so as to hold the positioning bracket 44 in the horizontal position as shown. Further, as shown in FIG. 19, mounting plates 47 are provided on both sides of the movable base 51 with the support shaft 45 in between, so as to maintain the position of the positioning bracket 44 in the left and right rotational direction at the reference position. Left and right rotation stoppers 46 for a copying function in the left and right rotation direction are protruded from the plate 47 and are opposed to each other, and abut against a vertical plate 45a implanted in the support shaft 45 from both sides.

In this way, the positioning bracket 44 is always held at the reference position in normal non-use conditions, and is configured to be rotatable back and forth and left and right via the spherical bearing 48a depending on the shift in the position of the other party. Guide hole 2O on the mating side when in use
It has an automatic tracing (alignment) function that allows you to change the A posture. This is similar to the case of the collector nozzle exchange device described above.

On the other hand, FIG. 18 (vertical cross-sectional view of the positioning bracket 44)
, as shown in FIG. 21 (X arrow view in FIG. 17), the front end of the circumferential portion of the positioning bracket 44 is fitted with guide holes 2OA (FIG. 35) on the door (replacement attachment) side at the top and bottom. A guide 20 for positioning is provided in a protruding manner. A movable disk 54 that can move forward and backward along the inner surface of the cylinder is in sliding contact with the positioning bracket 44 via a bush 54a. That is, on the back surface of the movable disk 54, protruding cylinders 56 are arranged vertically, and a gripping tool 55 is provided to protrude from a rectangular guide opening 55A opened in the center.

The upper and lower gripping tools 55 are connected to each other by a gripping cylinder 57. The groove 55a formed at the tip of the gripping tool 55 allows the upper and lower gripping tools 55 to be inserted into the upper and lower holes (molten steel flow path P) of the slide plate 9 (fixed plate 10).
When the gripping tool 55 is moved up and down by the gripping cylinder 57. In this way, the gripping tool 55 and the gripping cylinder 57 constitute means for gripping the object to be replaced.

On the left and right sides of the movable disk 54, there are means 58 (hereinafter referred to as loosening means) for loosening and tightening bolts 8 (Fig. 36) for the taper shims 7, which are fixing devices for the plates 9 and 10.
is the provision. That is, as shown in FIG. 20, this loosening means 58 is composed of a rotary motor 58a and a pole driver 59 that engages with a hexagonal groove formed in the head of the bolt 8 provided at the end of the shaft. ing.

In addition, the exchange device having the above-mentioned configuration has two types: one for fixed plate exchange and one for slide plate exchange. (Separate devices) It is desirable to install them in parallel. In this way, both plates can be replaced at the same time, speeding up the work.

(Fixed plate/slide plate replacement work) With the double door opening as shown, first extend the forward/backward movement cylinder 30 and move the entire device forward until the tip of the guide 20° comes into contact with the bottom of the molten steel ladle B. Stop. In this state, the positioning bracket 44 faces the front of the slide plate 9 (fixed plate 10).Then, the moving cylinder 52 is extended to move the positioning bracket 44 in the forward and backward directions, and the guide 20 is moved to the door side. Hole 20A (
(Fig. 35) and position it. At this time, even if there is some misalignment, it can be smoothly handled by the automatic tracing (alignment) function of the device. Next, the ejection cylinder 56 is extended to advance the movable disk 54, and the gripping tool 55 is inserted into the hole of the flow path P of the slide plate 9 (fixed plate 10).
The gripping cylinder 57 is extended and the gripping tool 55 is moved along the guide port 55A so as to open a space between the gripping tools 55 and 55 vertically.
The slide plate 9 (fixed plate 10) is fitted into the groove 55a of No. 5 and held. Next, after engaging the hexagonal groove of the head of the loosening means 8, the rotary motor 58a is driven to loosen the bolt 8 and release the fixation by the taper shim 7. Then, the moving cylinder 52 is actuated (contracted) again to retract the positioning bracket 44 to its original position, and then the forward and backward movement cylinder 30 is actuated to return the entire device to its original position. After this, a replacement cart (not shown) is driven to a new parts storage area to replace the old parts with new ones, and the same operation as above is performed again to attach new plates to each layer. It goes without saying that when replacing devices for the slide plate 9 and the fixed plate 10 are installed side by side, the replacement work can be performed at the same time.

C) Third invention (upper nozzle exchange device): When attaching the truncated conical upper nozzle 12 having the flow path P in the center to the molten steel ladle B, apply mortar M to the outer periphery of the upper nozzle 12 and replace the ladle. It is necessary for the upper nozzle 12 to be fitted into and fixed to the opening 14a of the refractory lining 14 (see FIGS. 26 and 31).

A side view of this exchange device is shown in FIG. 22, and a plan view of the main part is shown in FIG. 23. In the figures, components that are equivalent to those of the above-mentioned device are given the same reference numerals, and their functional explanations are omitted. .

In the figure, a rail guide 3 that engages with and slides on front and rear rails 31 laid in the front and back direction on an exchange cart (not shown)
2 is provided at the bottom of the base 27. A forward and backward movement cylinder 30 is connected to an end of the base 27, and the base 27 is movable along the front and rear rails 31 by its expansion and contraction operations. An elevating means 24 is erected at the center of the base 27, and its rond side supports an intermediate stand 25. A guide rod 22 and a guide/vertical copying stopper 23 are disposed before and after the elevating means 24. A lateral rail 28 is laid on the intermediate platform 25 in a direction perpendicular to the forward and backward movement, and a rail guide 26 that engages with and slides on the horizontal rail 28 is formed at the lower part of the support platform 16.

A drawing cylinder 64 is supported by a pivot shaft 62 via a cylindrical support body 63 on support plates 61 erected on both sides of the support stand 16 . This drawing cylinder 64 has a force of about 35 mm, which is greater than the necessary drawing force of the upper nozzle 12.

The rod 65 side of the drawing cylinder 64 is connected to a movable body 67. On the front surface of the support body 63, two stoppers 21 on the left and right are protruded from the upper part, and a guide 20 and a stopper 21 are protruded from the lower part.
67B is inserted to guide the forward and backward movement of the movable body 67.

A drawing rod 60 is provided protruding from the front surface of the movable body 67 (projection plate 67A). A notch 68, which is a rectangular locking means, is pivoted to a pivot pin 69 and stored in the front part of the extraction rod 6o.
interior). Further, as shown in FIGS. 24 and 25, a locking pin 70 is provided near the pivot pin 69 at the notch 68.
The groove provided in the drawing rod 60 by the Ron door 2 having the matching U member 71? It is configured to be movable along 2a.

That is, as shown in FIG. 23, the base end of the rod 72 is connected to the rond side of a cylinder 73 provided within the movable body 67.

The locking pin 70 has a substantially oval cross section (a>b) as shown in FIG. 25(C). Therefore, Notchi 6
In the stored state of 8 (FIG. 8(a)), the locking pin 70 is in contact with the inner surface of the U member 71 and there is no rotational play. In (A) of the same figure, the locking pin 70 is separated from the inner surface of the U member 71 as shown in the imaginary line, causing rotational play.

(Upper nozzle replacement work) First, operate the forward/backward movement cylinder 30 to move the entire replacement device forward, so that the tips of the three stoppers 21 come into contact with the replacement item installation side, and one guide 20 contacts the replacement item installation side. It will stop when it is inserted into the guide hole. At this time, the automatic alignment (alignment) function operates as described above. After the apparatus has been positioned in this way, the drawing cylinder 64 is extended to advance the movable body 67 forward while being guided by the guide 20 and stopper 21. Along with this, the withdrawal rod 60 is inserted into the flow path P of the upper nozzle 12, and when the insertion is completed,
When the cylinder 73 for driving the notch 68 is extended and the rod 72 is moved from the position (a) to the position (a) in FIG. Both ends protrude more (Fig. 25(b), 2nd
(See Figure 7). In this state, when the drawing cylinder 64 is contracted again and the movable body 67, that is, the drawing rod 60 is retreated,
The protruding part of the notch 68 with rotational play is the upper nozzle 12
When the cylinder 64 is swung and locked in accordance with the worn shape, and the drawing cylinder 64 is further contracted, the stopper 21 and the guide 20 are supporting the molten steel ladle B, so a drawing force acts on the upper nozzle 12. It is pulled out from the molten steel ladle B.

On the other hand, to install a new upper nozzle, the upper nozzle 12 (FIG. 26) whose outer periphery is coated with mortar M is fitted and held in the extraction rod 60, and the extraction cylinder 64 is extended to open the inner refractory 14. 14a (Fig. 27), press the rear end surface (formed in a slightly protruding shape) of the upper nozzle 12 with the front surface of the overhanging plate 67A of the movable body 67, and push it into the opening 14a to attach it. do.

The three exchange devices A), B), and C) described above may be combined arbitrarily and mounted on each exchange cart, but as shown in FIG. In other words, after removing the collector nozzle, slide plate, fixing plate, and upper nozzle, the exchange cart 74 is moved while the refractories of these molten steel ladle nozzles are driven, and the running wheels 75 are driven. As shown in Figure 30, it moves on the running rail 76 laid along the pot head turning machine 77 to the new refractory storage area, replaces the old and new refractories, and moves to the molten pot B position again. Then, perform the same operations as described above on each replacement device to install new refractories. Thus, the removal work →
Work efficiency is greatly improved because the molten steel ladle nozzle can be replaced as a series of operations: movement of the exchange cart → exchange of old and new refractories → movement of the exchange cart → installation work.

Although the above description has mainly been about a replacement device for the rotary nozzle R, which is one type of molten steel ladle nozzle, it goes without saying that this technical idea can also be applied to a sliding nozzle.

〔Effect of the invention〕

As described above, according to the present invention, (1) automation of handling of the molten steel ladle nozzle, which is a high-temperature and heavy object, can be achieved, and work efficiency and safety can be accelerated.

(2) The mounting force of these molten steel ladle nozzles, which until now relied on human intuition, becomes constant, making it possible to stabilize operations.

(3) Since the positioning of the device is facilitated by adopting the automatic copying mechanism, it has greatly contributed to the achievement of automation of the device.

[Brief explanation of drawings]

FIG. 1 is a side view of the collector nozzle changing device of the first invention;
Fig. 2 is a front view of the same, Fig. 3 is a partially cutaway plan view of the vicinity of the cylindrical jig, Fig. 4 is a perspective view of the main part of the head of the cylindrical jig, Fig. 5 is a sectional view of the main part, and Fig. 6 is a sectional view of the main part. The figure shows the arrangement of the collector nozzle (case) installation hole and guide hole, Figure 7 is a cross-sectional view of the guide hole, and Figure 8 shows the guide fitted into the guide hole when the collector nozzle replacement device is advanced, and the stopper is inserted into the replacement part. Drawings showing the state in which it is in contact with the mounting side, Fig. 9 (a) (b) (C) and Fig. 10 (
a) (b) (C) are the principle configuration diagrams of the means for lifting and lowering the gantry and for vertically copying; Figures 12 (a) and (b) are explanatory diagrams of the tracing means for horizontally rotating the support, Figure 13 is an explanatory diagram of the horizontal tracing means of the pedestal, and Figure 14 is an illustration of the collector nozzle (case) being mounted on a cylindrical jig. 15(a) and 15(b) are explanatory views of the operation of the support means for the collector nozzle (case) provided at the head of the cylindrical jig. Fig. 16 is a side view of the fixing plate/sliding plate exchanging device of the second invention, Fig. 17 is a front view thereof, Fig. 18 is a longitudinal sectional view of the positioning bracket, and Fig. 19 is a side view of the fixing plate/sliding plate exchanging device of the second invention. FIG. 20 is an explanatory view of the binding rod means, and FIG. 21 is a view taken in the direction of the X arrow in FIG. 17. Figure 22 is a side view of the upper nozzle exchange device of the third invention;
3 is a partially cutaway plan view of the same part, FIG. 24 is a cross-sectional view taken along line A-A of the drawing rod in FIG. FIG. 26 is a diagram showing how to attach the upper nozzle, and FIG. 27 is a drawing showing a state in which the extraction rod of the replacement device is inserted into the upper nozzle. Fig. 28 is an explanatory diagram when the exchanging devices according to the first to third inventions are mounted on one exchanging cart, Fig. 29 is a schematic diagram showing a state in which molten steel is received and taken from a converter to a molten steel ladle, and Fig. 30 Figure (a
)(c) is a drawing showing the state in which the molten steel ladle is placed on the ladle head turning machine and the state in which the ladle is tilted, and Figure 31 shows the state in which the rotary nozzle (upper nozzle, fixed plate, slide plate, collector nozzle) is placed on the molten steel ladle. A vertical cross-sectional view showing the installed state, Fig. 32 is a sub-view showing the state in which the outer door and the inner door are opened double-sided, Fig. 33 is a perspective view showing the state in which the collector nozzle is fitted into the collector nozzle case, and Fig. 34 is collector nozzle (case)
Fig. 35 is a diagram showing how the slide plate or fixed plate is attached to the door, and Fig. 36 is a sectional view of the main part of the mounting part.
・Drawing rod, 64...Drawing cylinder, 68...Notch (locking means), B... Molten steel ladle, H... Frame, R...
・Rotary nozzle (molten steel pot nozzle). 1... Collector nozzle, 2... Collector nozzle case, 3... Rotor (rotating frame), 4... Outer door,
9...Slide plate, 10...Fixed plate,
11... Inner door, 12... Upper nozzle, 14... Lining refractory, 17.50... Back and forth rotation stopper, 17c,
48a... Spherical bearing, 18.63... Support body, 19
... Cylindrical jig, 20... Guide, 2OA... Guide hole, 21... Stopper, 23... Vertical copying stopper, 24... Lifting means, 29... Lateral copying stopper,
30... Forward and backward movement cylinder, 44... Positioning bracket, 46... Left and right rotation stopper, 55... Grasping tool, 58... Binding rod means, 59... Pole driver, Fig. 6 Fig. 7 Fig. 4 Fig. 3 Fig. 5 Fig. 14 (a) Fig. 13 Fig. 15 (b) Fig. 19 Fig. 18 Fig. 24 Person drawing frame;, t, Fig. 25 Fig. 26 Fig. 27 Fig. 7A 2゜je, Saitama Fig. 28 Fig. 33 a Fig. 29 Fig. 31 ■ Inner fi11 Fig. 32 Fig. 36 Fig. 34 Fig. 35

Claims (3)

[Claims] (1) A pedestal that can be moved up and down, forward and backward, and movable at right angles for the automatic copying function is installed so that it can move forward and backward, and this pedestal is configured to be able to freely rotate in two directions, front, back, left, and right for the automatic copying function. A support is provided, and a cylindrical jig is provided in the front part of the support, which is configured to be rotatable and move forward and backward, and has a guide that fits with the side on which the replacement item is attached when moving forward, and an L-shaped groove on the outer periphery for engaging with the replacement item. An automatic molten steel ladle nozzle exchange device characterized by the following: (2) A pedestal is provided at the tip that has a guide that fits on the side where the replacement item is attached when moving forward, and is configured to be able to move up and down freely for the automatic copying function, and to move forward and backward at right angles. It has a guide that fits with the side on which the replacement item is attached when moving forward, and
For the automatic copying function, a positioning bracket configured to be movable in the forward and backward directions and rotatable in two directions, forward and backward and left and right, is provided so as to be movable in the forward and backward orthogonal directions, and this positioning bracket is provided with a gripping means for the replacement object. and a loosening means. (3) A pedestal that can be moved up and down, forward and backward, and movable in right angle directions for the automatic copying function is installed so that it can move forward and backward, and this pedestal has a support that can be freely rotated in one direction forward and backward for the automatic copying function. A guide that fits with the side on which the replacement item is attached when moving forward, a stopper that comes into contact with the side, and a pull-out rod that can move forward and backward are protruded from the front part of the support. An automatic molten steel ladle nozzle changing device characterized by having a locking means configured as follows.