JPH05318061A - Sliding nozzle device - Google Patents

Abstract

PURPOSE:To simply execute changing of a nozzle and applying of surface pressure in any case of opening/closing the nozzle by providing sliding mechanism for sliding in the condition of applying the surface pressure between the surface pressure applying mechanism and a sliding plate side. CONSTITUTION:By shrinking a jack 18, the surface pressure applying mechanism 11 is opened, and an upper nozzle member 4, fixed plate 5, sliding plate 6 and lower nozzle member 7 in nozzle mechanism 1 can be inputted/outputted in the axial direction of the nozzle at the same time. By extending the jack 18, a roller 9 for sliding is abutted on a sliding plate supporting plate 8 to apply the surface pressure. By this method, the surface pressures at the right and left sides can be adjusted and applied, and without breaking the refractory or developing the defect caused by applying of the uneven surface pressure, or without the leakage of molten metal, the nozzle can be used in the safe condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory plate for a sliding nozzle device, which is mounted just below an injection opening of a container for controlling the flow of molten metal, such as a tundish or a ladle for continuous casting of molten steel. The present invention relates to a surface pressure applying mechanism that enables the batch replacement of

[0002]

2. Description of the Related Art Conventionally, as a support / contact pressure adding mechanism for mounting and replacing a refractory plate of a sliding nozzle device, Japanese Patent Publication No. 51-4498 and Japanese Patent Publication No.
Some are described in Japanese Patent No. 22900.

This supporting / contact pressure adding mechanism is rotatable with respect to an upper nozzle mounted in an opening at the bottom of the molten metal container and a lower plate set under the upper nozzle, to a fixed metal frame attached to the bottom of the container. The slide metal frame that pivotally supports one end of it, and the slide metal frame that holds the intermediate plate and the open / close metal frame that houses the lower plate and the lower nozzle are rotated, and each refractory is attached by screws, cotters, cams, mortar joints, etc. It has a fixed structure.

Therefore, when the open / close metal frame and the slide metal frame for storing and fixing the refractory are open, the upper plate and the open / close metal frame and the slide metal frame stored and fixed in the fixed metal frame are stored and fixed. Since the intermediate plate and the lower plate that are installed are housed in the metal frames that are assigned to different positions, it is necessary to install or remove them separately at different positions, which makes it difficult to replace the refractory material. It took time and it was difficult to automate the refractory exchange by mechanical equipment.

Further, Japanese Patent Laid-Open No. 51-4026 discloses that each plate constituting a sliding nozzle is housed in a rotating frame attached to both sides of a container bottom gate. There is a problem that it takes time to adjust the mechanism for applying the surface pressure to the plate.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to easily replace a nozzle assembly in a batch with movement in the direction of the nozzle axis, and in particular, to slide a sliding plate with surface pressure applied. It is an object of the present invention to provide a sliding nozzle device that can be suitably applied to a two-plate type sliding nozzle that must be movably supported.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to at least a fixed plate and a sliding plate which slides on the lower surface thereof, and a surface which holds the sliding plate while applying surface pressure to the fixed plate with an elastic member. A sliding nozzle device provided with a pressure applying mechanism, wherein the surface pressure applying mechanism can be set in a retracted posture that does not interfere with the movement of the nozzle member in the axial direction, and the surface pressure applying mechanism and the sliding plate are further provided. And a sliding mechanism for slidably holding the sliding plate side when a surface pressure is applied.

Further, the surface pressure applying mechanism is provided with a movable surface pressure member for directly or indirectly restraining the sliding plate and a spring for urging the movable surface pressure member in the surface pressure applying direction of the sliding plate. be able to.

Further, even when the sliding plate is of a rotary type, a surface pressure adding mechanism for holding the sliding plate on the fixed plate while applying surface pressure by an elastic member is provided, and this surface pressure adding mechanism is used as the nozzle member. A sliding mechanism that can be set in a retracted position that does not interfere with the movement of the slide plate in the axial direction and that holds the slide plate side freely between the surface pressure applying mechanism and the slide plate side when applying the surface pressure. It can be configured to include.

Further, the sliding plate is provided with a sliding plate supporting plate connected to the sliding mechanism on the outer periphery thereof, and a flow path to the outflow end of the molten steel is formed in the sliding plate supporting plate. The lower nozzle member may be removable.

[0011]

When the surface pressure applying mechanism for maintaining the surface pressure between the sliding plate and the fixed plate by the elastic member is set to the retracted position, all nozzles including these sliding plate and fixed plate are placed. By inserting / removing the member in the axial direction, it becomes possible to attach / detach to / from the molten steel container.

Further, by providing a sliding mechanism between the surface pressure applying mechanism and the sliding plate side that enables the sliding plate side operation, when the surface pressure applying mechanism restrains the sliding plate. At the same time, the sliding plate can also slide with respect to this surface pressure adding mechanism, and the surface pressure can be held and the sliding operation of the sliding plate can be performed only by the surface pressure adding mechanism.

[0013]

FIG. 1 is a front view showing a sliding nozzle device according to an embodiment of the present invention in a partial cross section. It should be noted that, in the drawing, the mechanism for applying the surface pressure to the sliding plate is shown on the right side only for the sake of simplicity of description, but a pair of nozzles having the same structure is also arranged on the left side of the nozzle. It

In the drawing, reference numeral 1 denotes a nozzle mechanism composed of refractory bricks arranged in an opening 3 of a nozzle receiving brick 2 at the bottom of a ladle, and this nozzle mechanism 1 comprises an upper nozzle member 4
A lower plate, that is, a fixed plate 5, a lower plate, that is, a sliding plate 6, and a lower nozzle member 7. The sliding plate 6 is supported by a sliding plate supporting plate 8 and slides on a sliding roller 9 that supports the lower surface of the nozzle hole when opening and closing the nozzle hole.

Reference numeral 10 denotes a drawer block used when replacing the fixed plate 5, which is integrally attached to the metal case of the fixed plate 5, or is sandwiched between the fixed plate 5 and the fixed plate 13 to fix the fixed plate 5. Install.

The upper nozzle member 4, the fixed plate 5, the sliding plate 6, and the lower nozzle member 7 which compose the nozzle mechanism 1 are housed individually or in an integrated manner with adjacent members and housed and protected in a metal case. Can be

Reference numeral 11 denotes a surface pressure adding mechanism for applying a surface pressure to the sliding plate 6 from below the sliding plate support plate 8. The surface pressure applying mechanism 11 is rotatably pivotally attached to a support rod 14 attached to a fixed platen 13 integrated with a ladle outer shell 12, and a surface pressure member 16 including a spring 15,
A surface pressure member 17 attached to one end of the surface pressure member 16 and having a sliding roller 9 for directly applying surface pressure to the sliding plate support plate 8, and a surface pressure member 16 which is detachably attached and fixed to the other end. It is composed of a jack 18 which is also detachably connected to the board 13. Reference numeral 9a is a sliding roller attached to the other end of the surface pressure member 16.

The sliding plate support plate 8 is provided with an engaging member 34 for detachably fixing the lower nozzle 7 shown in FIG. 9, so that only the lower nozzle can be easily replaced if necessary. There is. When the strength of the refractory itself constituting the nozzle mechanism 1 is sufficiently high, the sliding plate support plate 8
Can be omitted.

The operating state of the sliding nozzle device having the above structure will be described below.

FIG. 1 shows a state before the nozzle mechanism 1 is mounted and surface pressure is applied. When the jack 18 is contracted, the surface pressure application mechanism 11 is opened, and the upper nozzle member 4 of the nozzle mechanism 1 is fixed. It shows a state in which the plate 5, the sliding plate 6, and the lower nozzle member 7 can be collectively taken in and out in the nozzle axis direction.

FIG. 2 shows a state in which the sliding roller 9 is brought into contact with the sliding plate supporting plate 8 to apply surface pressure by extending the jack 18. In FIG.
Since the surface pressure is applied by the jacks 18 arranged on both sides of the nozzle mechanism 1, it is possible to adjust the surface pressure on the left and right to add the surface pressure, and the refractory is damaged by the uneven surface pressure application. Alternatively, it can be used in a safe state without causing any defects and without causing leakage of molten metal.

In FIG. 3, a surface pressure block 19 for positioning the surface pressure applying mechanism 11 while maintaining an appropriate surface pressure by the jack 18 and maintaining the surface pressure is formed on the fixed platen 13. It shows a state of being inserted into the insertion groove 20. In this state, normal molten steel treatment operation is possible. However, the jack 18 may be damaged by high heat or dust when the molten steel treatment time is long and the working environment is bad. Therefore, in such a case, the jack 18 may be damaged.
The jack 18 can be prevented from being damaged by removing.

FIG. 4 is a view showing a state where the jack 18 is removed from the state shown in FIG.

5 to 9 show another embodiment of a member having the same function as the rollers 9 and 9a.

That is, in the above embodiment, an example in which only one roller 9 is used for the surface pressure member 17 as a sliding member for applying a surface pressure to the sliding plate support plate 8 is shown in FIG. As shown in, a plurality of rollers 9 can be arranged in parallel on the surface pressure member 17.

In addition to the rollers, a rail-shaped sliding member 21 such as graphite, carbon material, ceramics material, alloy (for example, brass) as shown in FIG. 6 and surface pressure member 17 as shown in FIG. Alternatively, the sliding plate supporting plate 8 or both of them may be attached by using fixing means such as bolts 22 so as to be replaced when worn. Further, as shown in FIG. 8, a slide cover 23 capable of moving in synchronization with the slide plate supporting plate 8 may be provided on the roller 9 to reduce the load applied to the refractory material by sliding. Good. As shown in FIG. 9, the sliding member 21 may be attached to the sliding plate support plate 8 side.

Instead of the jack 18, a hydraulic cylinder, a pneumatic cylinder, an electrically driven screw rod, or the like may be used.

FIGS. 10 to 14 show another example of the procedure for setting the refractory material in the sliding nozzle device of FIG.

In this example, the fixed plate 5, the sliding plate 6 and the lower nozzle member 7 are set in two steps.

FIG. 10 shows a fixed plate 5 and a sliding plate 6.
Is held by the plate handling rod 30, and the plate handling rod 30 is advanced toward the fixed platen 13 in the nozzle axis direction.

In FIG. 10, 31 is a disk-shaped mortar as a flexible sealing material, 32 is a bolt for fixing the fixing plate 5 to the fixing plate 13, 33 is a sliding plate 6 on the sliding plate support plate 8. Bolts for fixing, 3
Reference numeral 4 denotes a bayonet type engagement member for detachably fixing the lower nozzle member 7 to the sliding plate support plate 8. Reference numeral 10 denotes the drawer block shown in FIG. 1, which is integrally attached to the metal case of the fixed plate 5.

FIG. 11 shows a fixed plate 5 and a sliding plate 6.
Is pushed toward the fixed platen 13, and the surface pressure shown in FIGS. 1, 2 and 3 is applied in this state.

FIG. 12 shows a state in which the plate handling rod 30 is retracted after the bolt 32 is tightened.

FIG. 13 shows a state in which the lower nozzle member 7 is held by the lower nozzle handling rod 35 and the lower nozzle handling rod 35 is advanced toward the sliding plate 6 in the nozzle axial direction.

In FIG. 13, reference numeral 36 is a lower nozzle metal frame (holding mechanism is not shown), and 37 is a disk-shaped mortar as a flexible sealing material.

In FIG. 14, the lower nozzle member 7 is attached to the sliding plate 6
The state is shown in which the lower nozzle metal frame 36 is rotated and the engaging member 34 of the sliding plate support plate 8 is rotated.
The lower nozzle handling rod 35 is retracted to complete the setting.

The above-mentioned setting procedure is an example in which the fixed plate 5, the sliding plate 6, and the lower nozzle member 7 are set in two steps. On the other hand, in actual operation,
The upper nozzle member 4, the fixed plate 5, the sliding plate 6, and the lower nozzle member 7 often have different replacement frequencies, and the setting procedure may be as follows.

That is, only the lower nozzle member 7 is set, the upper nozzle member 4, the fixed plate 5, the sliding plate 6 and the lower nozzle member 7 are set in this order, and the upper nozzle member 4, the fixed plate 5, and the sliding member are set. This is a procedure for setting the plate 6 and the lower nozzle member 7 in two stages. In the case of,
Set by the procedure shown in FIGS. 13 and 14,
In this case, there is a procedure (not shown) for setting the upper nozzle member 4 prior to FIG. In the case of 1, the upper nozzle member 4, the fixed plate 5, and the sliding plate 6 are simultaneously set by the plate handling rod 30, and then the lower nozzle member 7 is set.

FIG. 15 is a vertical cross-sectional view of the main part showing another example.

In the figure, the surface pressure mechanism 11 is provided with a single surface pressure member 40, and the sliding plate support plate 8 is provided as in the previous example.
The sliding roller 9 is provided on the surface pressure member 40 on the side facing the surface pressure member 40. The surface pressure member 40 is pivotally supported by the support rod 14 so as to be rotatable, and is provided with a spring 41 as an elastic member in a direction that urges the support rod 14 in a clockwise direction with the support rod 14 as a rotation axis. In the block 42 arranged at the lower end of the spring 41,
One end of the jack 18 is connected and the block 42
A surface pressure block 19 is inserted between the surface pressure member 40 and the surface pressure member 40 to maintain the surface pressure in the same manner as in the above example.

As described above, in the above example, the spring is interposed between the two surface pressure members, whereas in this example, the spring is interposed between the single surface pressure member 40 and the fixed platen 13. 41 is incorporated. Also in this structure, as shown in the drawing, the jack 18 pulls up the block 42 to insert the surface pressure block 19 into the space generated by overcompressing the spring 41, and then loosens the jack 18 to reduce the repulsive force of the spring 41. The pressure is transmitted to the surface pressure member 40 via the block 19 and further applied via the sliding roller 9 as a surface pressure for pressing the sliding plate 6 against the fixed plate 5. That is, the surface pressure member 4
0 is restrained in the illustrated posture via the surface pressure block 19,
An appropriate surface pressure can be generated between the sliding plate 6 and the fixed plate 5 by the biasing force of the spring 41.

Also, the jack 42 blocks 42.
If you pull out the surface pressure block 19 after pulling up a little,
The surface pressure block 40 is allowed to freely rotate around the support rod 14. Therefore, if the surface pressure block 40 is rotationally shifted in the counterclockwise direction in the drawing, the lower side of the nozzle mechanism 1 similar to that in the case of FIG. 1 can be opened, and the nozzle mechanism 1 can be moved along its axis line as in the above example. It can be put in or taken out in any direction.

FIG. 16 is a vertical cross-sectional view of a main part when the surface pressure applying mechanism 11 described in FIGS. 1 to 4 is applied to a rotary nozzle, and FIG. 17 is a bottom view thereof.

In the case of the rotary type nozzle mechanism 1, a disk-shaped fixed plate 5 and a sliding plate 6 are provided, two through holes for molten steel are formed in these plates, and the lower surface thereof is aligned with these through holes. The two lower nozzle members 7 are connected to each other. The sliding plate support plate 8 has a shape capable of supporting the two lower nozzle members 7.

Further, the slide plate support plate 8 is provided so that the two through holes are aligned with respect to the upper nozzle member 4.
A drive mechanism for rotating the is provided. As this drive mechanism, as shown in FIG. 17, a gear 8a that meshes with the outer peripheral surface of the sliding plate support plate 8 may be provided, and the gear 8a may be driven by an electric motor (not shown).

Each of the surface pressure applying mechanisms 11 has the same construction as that described above, and is arranged at a total of six places as shown in FIG. These surface pressure applying mechanisms 11 operate in the same manner as described with reference to FIGS. 1 to 4, and set the surface pressure member 17 to a position retracted from the lower surface of the sliding plate support plate 8 as shown in FIG. it can. Therefore, the sliding plate support plate 8 can be swung by the rotational drive from the gear 8a,
For example, in FIG.
By rotating it once, the posture can be changed so that the other through hole serves as the molten steel flow path. Further, since the lower side of the sliding plate support plate 8 is opened, it is possible to take the entire nozzle mechanism 1 in and out in the axial direction, as in the above example.

FIG. 18 shows the six surface pressure applying mechanisms 11 shown in FIG.
It is a partial bottom view which shows the example which made 2 units.

In this example, three surface pressure members 17 are connected to a common one surface pressure member 16 via a support rod 14 so as to be vertically swingable, and shown in FIGS. 1 to 4 or 16. Similarly to the above, a spring for holding the surface pressure is provided at a predetermined portion. Further, the surface pressure member 16 is connected to a single jack 18, and the operation of the jack 18 causes three surface pressure members 1 to be connected in series.
7 are operated at the same time. The surface pressure member 17 is provided with sliding rollers 9 having different rotational axis directions, and these sliding rollers 9 can be abutted against the lower surface of the disk-shaped sliding plate support plate 8. The surface pressure applying mechanism 11 provided in the right half is similar to that shown in the figure.

Even when the surface pressure applying mechanism 11 is composed of two units as described above, the sliding plate supporting plate 8 can be supported and released by driving the respective jacks 18, and the sliding plate can be supported. The supporting plate 8 can be swung and the entire nozzle mechanism 1 can be replaced.

[0050]

According to the present invention, the following effects can be obtained.

(1) Since the surface pressure can be applied between the nozzle plates via the sliding plate supporting plate or the sliding member that is in direct contact with the sliding plate, the sliding in the state where the surface pressure is applied is provided. The moving plate can be slid, and replacement and surface pressure application can be easily performed regardless of whether the nozzle is opened or closed.

(2) Since the surface pressure applying mechanisms on both sides of the nozzle mechanism operate in conjunction with each other, the attachment / detachment of each nozzle plate and the release of the surface pressure application are performed mechanically continuously, so that the batch exchange can be automated and speeded up. Can be done easily.

(3) Addition of surface pressure, nozzle plate attachment,
The equipment for fixing each nozzle plate can be formed compactly.

(4) Since the nozzle plate can be attached and detached while being held integrally, it is possible to save the on-site equipment and its space, and it is easy to rationalize the peripheral work.

[Brief description of drawings]

FIG. 1 is a front view showing a partial cross section of a sliding nozzle device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an operating state of the surface pressure applying mechanism of FIG.

FIG. 3 is a diagram showing an operating state of the surface pressure applying mechanism of FIG. 1.

4 is a diagram showing an operating state of the surface pressure applying mechanism of FIG. 1. FIG.

FIG. 5 is a diagram showing an arrangement of rollers as sliding members.

FIG. 6 is a diagram showing another example of a sliding member.

FIG. 7 is a view showing a mounting state of the sliding member of FIG.

FIG. 8 is a diagram showing another example of a sliding member.

FIG. 9 is a diagram showing another example of the sliding member.

10 is a diagram showing a procedure for setting a refractory material in the sliding nozzle device of FIG.

FIG. 11 is a diagram showing a procedure for setting the refractory material following FIG.

FIG. 12 is a diagram showing a procedure for setting the refractory material following FIG. 11.

FIG. 13 is a diagram showing a procedure for setting the refractory material following FIG.

FIG. 14 is a diagram showing a procedure for setting the refractory material following FIG.

FIG. 15 is a diagram showing a main part of an example of a surface pressure applying mechanism in which an elastic member is interposed between a fixed platen and one surface pressure member.

FIG. 16 is a cutaway front view showing the arrangement of a surface pressure applying mechanism for a rotary nozzle.

FIG. 17 is a bottom view showing the arrangement of the surface pressure applying mechanism for the rotary nozzle.

FIG. 18 is a bottom view showing an example in which the surface pressure applying mechanism is unitized.

[Explanation of symbols]

1 nozzle mechanism, 2 nozzle bricks, 3 openings,
4 upper nozzle member, 5 fixed plate, 6 sliding plate, 7 lower nozzle member, 8 sliding plate support plate, 9
Sliding roller, 10 fixed plate drawing block,
11 surface pressure adding mechanism, 12 ladle outer shell, 13 fixed plate,
14 support rods, 15 springs, 16 surface pressure members, 17
Surface pressure member, 18 jacks, 19 surface pressure block, 20
Surface pressure block insertion groove, 21 sliding material, 22 bolt,
25 slide cover, 30 plate handling rod, 31 disk mortar, 32, 33 bolts,
34 engagement member, 35 lower nozzle handling rod,
36 Lower nozzle metal frame, 37 Disc mortar

Claims (4)

[Claims] 1. A sliding comprising at least a fixed plate and a sliding plate which slides on the lower surface thereof, and a surface pressure adding mechanism for holding the sliding plate while applying surface pressure to the fixed plate by an elastic member. In the nozzle device, the surface pressure applying mechanism can be set in a retracted posture that does not interfere with the movement of the nozzle member in the axial direction, and further, the surface pressure applying mechanism is provided between the sliding plate side. A sliding nozzle device comprising a sliding mechanism for slidably holding the sliding plate side when added. 2. The surface pressure applying mechanism comprises a movable surface pressure member for directly or indirectly restraining the sliding plate, and a spring for urging the movable surface pressure member in the surface pressure applying direction of the sliding plate. The sliding nozzle device according to claim 1, further comprising: 3. A sliding nozzle device comprising at least a fixed plate and a rotary type sliding plate which is slidably in contact with a lower surface of the fixed plate, wherein the sliding plate is applied to the fixed plate with a surface pressure by an elastic member. A surface pressure applying mechanism for holding while applying the surface pressure applying mechanism can be set in a retracted posture that does not interfere with the movement of the nozzle member in the axial direction, and further, the surface pressure applying mechanism and the sliding plate side A sliding nozzle device provided with a sliding mechanism between which the sliding plate side is slidably held when a surface pressure is applied. 4. The sliding plate is provided with a sliding plate supporting plate connected to the sliding mechanism on an outer contour thereof, and the sliding plate supporting plate forms a flow path to an outflow end of the molten steel. The sliding nozzle device according to claim 1, wherein the nozzle member is removable.