JP5306107B2 - Slab guide device for continuous casting equipment - Google Patents

Description

  The present invention relates to a slab guide device that guides a slab using a guide roll in a continuous casting facility, and particularly to a slab guide device that includes means for cooling both the guide roll and the slab. is there.

In recent years, when cooling a slab in a continuous casting facility, it is difficult to cause deterioration of the slab quality due to cooling, and the controllable cooling range is wide. The mist spray cooling (air-water spray cooling) like 1-patent document 3 is mainly performed.
On the other hand, with respect to a guide roll for guiding a slab, a technique for cooling the same as the slab has been proposed from the viewpoint of preventing adhesion of scale and extending the life of the roll. For example, Patent Document 4 discloses a technique for efficiently cooling a roll by water spray cooling. However, also in the cooling of the rolls by water spray cooling, the water sprayed on the rolls scatters and adheres to the surface of the slab as in the case of water spray cooling of the slab, or the water colliding with the rolls flows down and casts. Adhering to the surface of the piece may adversely affect the temperature control of the slab.

  Therefore, in Patent Document 5, in order to avoid these drawbacks of water spray cooling, part of the mist sprayed to cool the slab is also used for cooling the slab, and the slab and the roll are separated by mist. A slab guide device has been developed that can cool both.

JP-A-6-335756 JP-A-7-108357 JP 2000-254663 A Japanese Patent Laid-Open No. 2002-126859 JP-A-4-279260

By the way, when performing mist spray cooling, it is necessary to provide the coolant supply pipe | tube which consists of the cooling water header pipe | tube which supplies cooling water, the air header pipe | tube which supplies air, and the nozzle which injects cooling water in mist form. .
The nozzle is a mixing part (air / water mixing part) that mixes the cooling water supplied from the cooling water header pipe and the air supplied from the air header pipe, a nozzle tip part (nozzle tip) that jets in the form of a mist, and a mixing part And a pipe connecting the nozzle tip.

  As for the nozzle, those having various shapes are used depending on the positional relationship between the guide roll, the frame, and the coolant supply pipe. For example, a “straight type” nozzle in which a pipe extends straight, an “elbow type” nozzle bent in an L shape, a “bend type” nozzle in which a part of a straight pipe is bent in an inclined shape, or This is a “three-dimensional bending type” nozzle that is a complicated three-dimensional bending of a pipe. Among such nozzles, there is no bias in the distribution of the sprayed mist, the manufacture is easy, and the mounting position of the nozzle tip is excellent. It is most preferable to use a straight "straight type" nozzle for connecting the pipes.

  For example, in the case of only slab cooling without cooling the guide roll, a straight nozzle can be incorporated into the slab guide device without any problem. For example, if the width of the slab is narrow, such as bloom or billet, it is sufficient that the nozzle is provided at one location in the width direction with respect to each side surface of the slab. Therefore, each nozzle may be attached so that its tip end faces the center in the width direction (or the center in the thickness direction) of the slab and is spaced from the slab. If a plurality of such mounting nozzles are arranged along the longitudinal direction, even straight nozzles can be incorporated into the slab guide device without any problem.

In this case, the coolant supply pipe (air header pipe or cooling water header pipe) for supplying air or cooling water to the nozzle is disposed along the outer peripheral side of the frame of the slab guide device along the longitudinal direction, The base end side (mixing part side) of a plurality of nozzles arranged in the center in the width direction is connected in the longitudinal direction.
On the other hand, in the case where only the guide roll is cooled without cooling the slab, the straight nozzle can be incorporated into the slab guide device without any problem as described above. In this case, each nozzle may be attached with a predetermined distance so that the nozzle tip portion faces the center in the width direction of the guide roll.

  However, when both slab cooling and guide roll cooling are performed by mist spray cooling, the slab cooling nozzle and the guide roll cooling nozzle are arranged in a line at the center in the width direction of the slab. Then, it is necessary to arrange the two coolant supply pipes for sending the coolant to the respective nozzles at the same position on the outer peripheral side of the frame, and the two coolant supply pipes are arranged on the second floor on the outer peripheral side of the frame. It is possible to deploy with a built-up structure (a structure that overlaps inside and outside).

In that case, for example, even if an attempt is made to attach a straight type nozzle to the outer coolant supply pipe, a situation arises in which the nozzle cannot be provided because the inner coolant supply pipe becomes an obstacle.
In order to avoid such interference between the coolant supply pipe and the nozzle, a non-straight type nozzle such as an elbow type or a bend type must be employed for either the slab cooling or the guide roll cooling. In other words, it becomes difficult to employ a straight nozzle having excellent performance for both slab cooling and roll cooling.

  In addition, when adopting a structure in which the coolant supply pipe for slab cooling and the coolant supply pipe for roll cooling overlap on the inside and outside, either one of the coolant supply pipes is provided so as to protrude greatly to the outer peripheral side of the frame. The size of the slab guide device becomes large. Of course, it is not preferable to install such a slab guide device in a factory where only a limited space is allowed.

  The present invention has been made in view of the above-mentioned problems, and both the slab and the guide roll can be reliably cooled using a straight type nozzle, and the piping is compactly integrated and installed. It aims at providing the slab guide apparatus of the continuous casting equipment provided with the cooling function which does not require a space.

In order to solve the above problems, the slab guide device for continuous casting equipment of the present invention employs the following technical means.
That is, the slab guide device for continuous casting equipment according to the present invention includes a guide roll that sandwiches a slab drawn from a mold provided in the continuous casting equipment and guides the slab in a longitudinal direction, and supports the guide roll on an inner peripheral surface. A slab guide device comprising: a frame to perform; a roll cooling means for cooling the guide roll; and a slab cooling means for cooling the slab,
The slab cooling means supplies a plurality of straight-type slab cooling nozzles for spraying a coolant onto the side surface of the slab, supplies the coolant to these slab cooling nozzles, and extends in the longitudinal direction on the outer peripheral surface of the frame. A slab coolant supply pipe arranged to extend along the roll, and the roll cooling means sprays the coolant onto a guide roll, and a plurality of straight type roll cooling nozzles, and the coolant is supplied to these roll cooling nozzles. And a roll coolant supply pipe arranged to extend along the longitudinal direction on the outer peripheral surface of the frame, and the slab cooling nozzle has a base end connected to the slab coolant supply pipe. The roll cooling nozzles are mounted side by side in the longitudinal direction so that the tip faces the center in the width direction of the slab, and the base end of the roll cooling nozzle is connected to the roll coolant supply pipe. The guide rolls are mounted side by side in the longitudinal direction so as to face the center in the width direction, and the slab coolant supply pipe is disposed on one side across the center in the width direction of the slab and roll cooling An agent supply pipe is arranged on the other side of the slab.

In addition, it is preferable that the said slab cooling nozzle and the roll cooling nozzle are alternately arrange | positioned along a longitudinal direction.
Further, the slab coolant supply pipe and the roll coolant supply pipe are integrated with two pipes, a cooling water header pipe for supplying cooling water to each nozzle and an air header pipe for supplying air to each nozzle. It is good to be prepared for.

  The cooling water header pipe and the air header pipe are formed of a square steel pipe having a flat cross section in a direction perpendicular to the longitudinal direction, and the slab coolant supply pipe and the roll coolant supply pipe are the cooling water header. It is preferable that the square steel pipe of the pipe and the square steel pipe of the air header pipe are overlapped so that the long side surface faces the slab side surface and the long side surface faces each other. .

  According to the slab guide device of the continuous casting equipment of the present invention, the slab and the guide roll can be reliably cooled using a straight type nozzle excellent in the accuracy of the mounting position of the nozzle tip, and the piping structure is simple. Therefore, a large space is not required for installation.

It is a side view of the continuous casting installation provided with the slab guide apparatus of this invention. It is a front view of the A section (slab guide device) of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. FIG. 4 is a sectional view taken along line BB in FIG. 3. (A) is a front view of a coolant supply pipe and an air supply pipe, (b) is the side view. It is the DD sectional view taken on the line of FIG. It is the figure which compared and showed the nozzle attachment position of a roll cooling means and a slab cooling means.

Embodiments of a slab guide device according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows a continuous casting facility 2 provided with a slab guide device 1 of the present invention.
The continuous casting facility 2 is a facility for continuously casting a slab S such as a bloom or billet, a tundish 4 for temporarily storing molten steel supplied from a ladle 3, and a tundish 4 from the tundish 4. It has a mold 5 to which molten steel is supplied and a slab guide device 1 provided along the casting direction (longitudinal direction) below the mold 5.

The tundish 4 has a bottomed box shape as a whole, and an immersion nozzle 6 is provided at the bottom of the tundish 4. The immersion nozzle 6 can stop or restart injection of molten steel from the tundish 4 to the mold 5 by opening and closing a slide valve or a stopper (not shown).
As shown in FIG. 1 to FIG. 4, the slab guide device 1 sandwiches the slab S drawn out from the mold 5 and guides the slab S along the longitudinal direction. Cooling is also performed.

The slab guide device 1 includes a frame 7 disposed around the slab S so as to surround the slab S, and the frame 7 sandwiches the slab S and guides a plurality of guide rolls 8. A slab cooling means 9 for cooling the piece S and a roll cooling means 10 for cooling the guide roll 8 are provided.
As shown in FIG. 1, the slab S is formed in a long shape by continuously casting with a mold 5, and a cut surface (in a direction perpendicular to the longitudinal direction) according to the shape of the mold 5. The cut cross section is formed in a substantially rectangular shape.

  In the present specification, of the four side surfaces of the slab S, a surface having a relatively large surface area (upper and lower surfaces in FIG. 4) is referred to as a wide surface 11, and a surface having a small surface area (left and right side surfaces in FIG. 4). Is called the narrow surface 12. 4 is referred to as the width direction (left-right direction) when describing the slab guide device 1, and the up-down direction of the paper surface of FIG. 4 is referred to as the thickness direction (up-down direction). Furthermore, the direction away from the slab S on the paper surface of FIG. 4 is referred to as the outer side when the slab guide device 1 is described, and the approaching direction is referred to as the inner side.

As shown in FIGS. 2 and 3, the frame 7 includes a first frame 13 that is elongated along the longitudinal direction and a second frame that is elongated along the width or thickness direction. 14 are welded together in a cross-girder shape (made a braided shape) to form a structure that is long in the longitudinal direction and hollow inside.
The first frame 13 is composed of a square steel material provided in parallel with each other on each of the wide surface 11 side and the narrow surface 12 side of the slab S. The two first frames 13 provided on the respective side surfaces are arranged at symmetrical positions with respect to the center of the slab S in the width direction or the center of the slab S in the thickness direction. A bearing portion 15 that rotatably supports the guide roll 8 is attached to the inner peripheral side.

  The 2nd frame 14 is comprised with the square steel material attached along the width direction or the thickness direction, and this square steel material is provided with the substantially U-shaped cross section. The second frame 14 is attached so as to intersect perpendicularly with each of the two first frames 13 provided on each side surface, and in the longitudinal direction, there are several guide rolls (in this embodiment, the guide rolls 3 to 3). It is deployed with an interval of 4).

  As shown in FIG. 4, the guide roll 8 includes a pair of wide surface guide rolls 16 that sandwich the slab S along the thickness direction, and a set of narrow surface guide rolls 17 that sandwich the slab S along the width direction. It has. The wide surface guide roll 16 and the narrow surface guide roll 17 are formed such that the wide surface guide roll 16 that contacts the wide surface 11 of the slab S has a longer roll width than the narrow surface guide roll 17 that contacts the narrow surface 12. Yes.

  The wide surface guide roll 16 is supported by a bearing portion 15 on the inner peripheral side of the first frame 13 disposed on the wide surface 11 side so as to be rotatable about an axis facing the width direction. The narrow surface guide roll 17 is supported by a bearing portion 15 on the inner peripheral side of the first frame 13 disposed on the narrow surface 12 side so as to be rotatable about an axis facing the thickness direction. The wide-surface guide roll 16 and the narrow-surface guide roll 17 have the same roll diameter between the rolls having the same number (longitudinal position) from the mold 5, and press the slab S with almost the same surface pressure from the four directions. It has a configuration that can be included.

  The wide surface guide roll 16 and the narrow surface guide roll 17 are formed so that the roll diameter gradually increases as the distance from the mold 5 increases along the longitudinal direction. In the present embodiment, the wide-surface guide roll 16 and the narrow-surface guide roll 17 are small-diameter rolls from the mold 5 to the fourth, and the fifth and subsequent rolls are large-diameter rolls having a larger roll diameter than the small-diameter roll. By increasing the roll diameter along the longitudinal direction in this way, the guide roll 8 is configured to be surely pressed down with a strong force even if it is a hard slab S whose shell has been solidified.

Next, the “means for cooling the slab and the guide roll”, ie, the slab cooling means 9 and the roll cooling means 10, which is a characteristic configuration of the present invention, will be described in detail.
The slab cooling means 9 of the present invention includes a plurality of straight-type slab cooling nozzles 18 that spray a coolant onto the side surface of the slab S, supplies coolant to these slab cooling nozzles 18, and A slab coolant supply pipe 19 is provided on the outer peripheral surface so as to extend along the longitudinal direction. Further, the roll cooling means 10 of the present invention has a plurality of straight-type roll cooling nozzles 27 for spraying a coolant onto the guide roll 8, supplies the coolant to these roll cooling nozzles 27, and is long on the outer peripheral surface of the frame 7. And a roll coolant supply pipe 28 arranged to extend in the direction.

The slab cooling nozzle 18 is attached to the slab coolant supply pipe 19 in the longitudinal direction so that the base end is connected to the slab coolant supply pipe 19 and the front end faces the center of the slab S in the width direction. The base end is connected to the roll coolant supply pipe 28, and the front end is attached side by side in the longitudinal direction so as to face the center in the width direction of the guide roll 8.
In the slab guide device 1 of the present invention, the slab coolant supply pipe 19 is arranged on one side with the center of the slab S in the width direction, and the roll coolant supply pipe 28 is on the other side of the slab S. It is characterized by being deployed on the side.

  In addition, since the slab cooling means 9 and the roll cooling means 10 are similarly provided with respect to each surface (wide surface 11 and narrow surface 12) of the slab S, they are provided on the wide surface 11 side in the following description. The slab cooling means 9 and the roll cooling means 10 of the present invention will be described by exemplifying the above-mentioned ones (visible in the front of FIG. 2). Moreover, the slab cooling means 9 and the roll cooling means 10 may have members that are provided in common, such as a cooling water header pipe 20 and an air header pipe 21 described later. Therefore, in the following description, for example, the cooling water header pipe provided in the slab cooling means 9 is referred to as the cooling water header pipe 20a, and the cooling water header pipe provided in the roll cooling means 10 is referred to as the cooling water header pipe 20b. As described above, the slab cooling means 9 and the roll cooling means 10 will be described with a or b added to the end of the reference numerals.

As shown in FIGS. 5 (a) and 5 (b), the slab cooling means 9 includes a plurality of straight-type slab cooling nozzles 18 for spraying a coolant onto the side surface of the slab S, and these slabs. A slab coolant supply pipe 19 that supplies coolant to the cooling nozzle 18 is provided. The coolant used for the slab cooling means 9 is a mist of cooling water, which is obtained by atomizing a mixture of cooling water and air at a predetermined mixing ratio.
The slab coolant supply pipe 19 includes a cooling water header pipe 20a that supplies cooling water to the slab cooling nozzle 18 and an air header pipe 21a that supplies air to the slab cooling nozzle 18 in an integrated manner. ing. Each of the coolant header pipe 20a and the air header pipe 21a is formed of a square steel pipe having a hollow inside, and each of the square steel pipes is long so that the coolant can be supplied to the plurality of slab cooling nozzles 18. It arrange | positions along the direction and can transfer a cooling water and air to each of the some slab cooling nozzle 18. FIG.

  The square steel pipes constituting the cooling water header pipe 20a and the air header pipe 21a are formed in a substantially rectangular shape having a flat cross section perpendicular to the longitudinal direction so that the side surface on the long side is wider than the side surface on the short side. It has become. In these square steel pipes, the long side surfaces are opposed to the side surfaces of the slab S (the long side surfaces are directed to the slab S side), and the long side surfaces are square steel pipes. The slab coolant supply pipes 19 are arranged so as to face each other so that the slab coolant supply pipe 19 does not protrude outwardly from the frame 7 while securing a sufficient flow path area. In the slab coolant supply pipe 19 of the present embodiment, the square steel pipe closer to the slab S is the cooling water header pipe 20a, and the square steel pipe far from the slab S is the air header pipe 21a. Yes.

  The coolant header pipe 20a and the air header pipe 21a are provided with attachment members 22a that can be attached to the frame 7 at both ends in the longitudinal direction. One end of the mounting member 22a is joined to the header pipes 20a and 21a by welding or the like, and the other end is engaged with the surface of the first frame 13 of the frame 7 using a bolt or the like. The cooling water header pipe 20a In addition, both the air header pipe 21a and the air header pipe 21a can be fixed to the frame 7 integrally.

On the side of the slab coolant supply pipe 19 (the side far from the center line C passing through the center in the width direction of the slab S, the inner side in the width direction) is orthogonal to both the coolant header pipe 20a and the air header pipe 21a. As described above, a plurality of slab cooling nozzles 18 (six in the case of this embodiment) are arranged at intervals in the longitudinal direction.
In addition, since the mounting interval and arrangement of the slab cooling nozzle 18 and a roll cooling nozzle 27 described later are features of the present invention, these features will be described in detail later.

  As shown by a solid line in FIG. 6, the slab cooling nozzle 18 includes a mixing unit 23 a that mixes air and cooling water supplied from the slab coolant supply pipe 19 at a predetermined mixing ratio to generate mist, A pipe 25a that sends the mist generated in the mixing portion 23a to the nozzle tip 24a, and a nozzle that sprays the mist sent by the pipe 25a at a predetermined spray angle (width direction angle / thickness angle in the slab flow direction) and distribution The tip 24a (nozzle tip 26a) is provided. At the left end in the width direction of the slab coolant supply pipe 19 (the side far from the center line C passing through the center in the width direction of the slab S, the outside in the width direction), a supply pipe mounting member 29a formed in a plate shape has a plurality of slabs. A cooling nozzle 18 is provided for each. The supply pipe attachment member 29a integrally connects the coolant header pipe 20a and the air header pipe 21a, and supplies a slab coolant via a supply pipe attachment bolt 32a provided between the slab cooling nozzle 18. The slab cooling nozzle 18 is fixed to the pipe 19.

  The mixing unit 23a is provided adjacent to the cooling water header pipe 20a and the air header pipe 21a, and can supply air from the air header pipe 21a and cooling water from the cooling water header pipe 20a to the inside. ing. The mixing unit 23a can generate mist (fine particles of cooling water) by mixing cooling water from the cooling water header pipe 20a with the air supplied to the inside. The mist generated inside the mixing unit 23 a is sent to the pipe 25.

The pipe 25a is a straight tube made of stainless steel, and can accommodate and transfer the mist generated in the mixing unit 23a. The pipe 25a is attached so that the pipe axis faces in the normal direction with respect to the side surface of the slab S.
In this invention, a nozzle using a straight tube for the pipe is called a straight type. In addition to straight pipes, straight nozzles include those that are bent or curved so as not to affect the distribution of sprayed mist.

  The reason why such a straight nozzle is used as the slab cooling nozzle 18 is as follows. That is, in the case of a curved tube used for an elbow-type or bend-type nozzle, a large centrifugal force is applied to the mist generated by the mixing unit 23a when passing through the curved portion of the tube, resulting in a mist distribution characteristic. May have an impact. In particular, when the curved portion of the tube is close to the nozzle tip and the centrifugal force acts along the width direction of the slab S, there is a high possibility that the mist distribution is biased. However, in the case of a straight tube having no curved portion, there is no possibility that an excessive centrifugal force is applied to the mist transferred through the pipe 25a, so that the mist is sprayed (sprayed) from the nozzle tip 24a with a uniform distribution. Is possible.

A nozzle tip 26a for injecting mist toward the slab S is attached to the nozzle tip 24a. The nozzle tip 26a has pores (not shown) that open toward the slab S and communicate with the inside and outside of the nozzle. The pores are adjusted to a predetermined opening shape so that the mist spreads at a predetermined injection angle.
Similar to the slab cooling unit 9, the roll cooling unit 10 includes a plurality of straight type roll cooling nozzles 27 that spray the coolant onto the guide rolls 8, and a roll coolant that supplies the roll cooling nozzles 27 with the coolant. And a supply pipe 28.

  The roll cooling nozzle 27 and the roll coolant supply pipe 28 are longer than the slab cooling nozzle 18 and the slab coolant supply pipe 19 described above in the length along the longitudinal direction of the roll coolant supply pipe 28. The mounting position of the roll cooling nozzle 27 with respect to the coolant supply pipe 28, the length of the pipe 25b of the roll cooling nozzle 27, the nozzle tip 26b attached to the nozzle tip 24b, etc. are different, but the other structures are the same. ing.

As shown in FIG. 7, the roll coolant supply pipe 28 includes an air header pipe 21 b, a coolant header pipe 20 b, and an attachment member 22 b as in the case of the slab coolant supply pipe 19. The slab coolant supply pipe 19 is longer than the slab coolant supply pipe 19 so that the coolant can be supplied to many nozzles from the slab coolant supply pipe 19. The reason why the slab coolant supply pipe 19 is made shorter in the longitudinal direction than the roll coolant supply pipe 28 in this way is as follows.
That is, if the length of the slab coolant supply pipe 19 is shortened and a plurality of slab coolant supply pipes 19 are provided in the longitudinal direction, a plurality of slab cooling nozzles 18 arranged in the longitudinal direction are provided. Each slab coolant supply pipe 19 is divided into several zones in the longitudinal direction, and the slab cooling nozzle 18 in each zone can be controlled independently. As a result, for example, the cooling strength of the upstream slab cooling nozzle 18 can be made stronger than that of the downstream slab cooling nozzle 18, and the upstream side of the slab S can be cooled more strongly than the downstream side.
In the present embodiment, roll cooling does not need to be controlled by subdividing zones as much as cast slab cooling, so the roll coolant supply pipe 28 is illustrated as not being divided into a plurality of zones. The agent supply pipe 28 may be divided into a plurality of zones.

As shown by a dotted line in FIG. 6, the pipe 25b of the roll cooling nozzle 27 is located closer to the nozzle than the side surface of the slab S by the roll diameter of the guide roll 8 to be cooled. The length is shorter than that of the cooling nozzle 18.
Further, the nozzle tip 26a of the slab cooling nozzle 18 is formed so that mist can be sprayed at a wide spray angle so that a wide range can be cooled with respect to the flow direction of the slab on the side surface of the slab S. In the nozzle tip 26b provided at the nozzle tip 24b of the roll cooling nozzle 27, a nozzle chip having an injection angle smaller than the slab cooling nozzle 18 with respect to the slab flow direction is used.

By the way, when the slab cooling nozzle 18 and the roll cooling nozzle 27 are concentrated in the center in the width direction, the slab coolant supply pipe 19 and the roll coolant supply pipe 28 that supply the coolant to these nozzles are mutually connected. Interfering with position.
Therefore, in the slab guide device 1 of the present invention, the slab coolant supply pipe 19 is connected to the slab S in order to avoid positional interference between the slab coolant supply pipe 19 and the roll coolant supply pipe 28. The roll coolant supply pipe 28 is disposed on the other side of the slab S with respect to the width direction center while being disposed on one side with the width direction center interposed therebetween.

  That is, as shown in FIG. 2, the slab coolant supply pipe 19 of the slab cooling means 9 is disposed at a position offset to the left side from the center line C passing through the center of the slab S in the width direction, and roll cooling. The roll coolant supply pipe 28 of the means 10 is disposed at a position offset to the right side from the center line C passing through the center of the slab S in the width direction. Therefore, the slab coolant supply pipe 19 and the roll coolant supply pipe 28 do not interfere with each other in position.

  Also, a main pipe 30 for supplying the coolant from the supply source to the slab coolant supply pipe 19 is provided on the left side (width direction outer side) of the slab coolant supply pipe 19. On the right side (outer side), a main pipe 31 for supplying the coolant from the supply source to the roll coolant supply pipe 28 is provided. The original pipe 30 provided in the slab coolant supply pipe 19 extends further leftward from the slab coolant supply pipe 19, and the original pipe 31 provided in the roll coolant supply pipe 28 is provided in the roll coolant supply pipe 28. Extends further to the right. Therefore, these original pipes 30 and 31 do not interfere with the slab coolant supply pipe 19 and the roll coolant supply pipe 28 in position.

  The slab coolant supply pipe 19 has a slab cooling nozzle 18 on the right side (side near the center line C, the inner side in the width direction), and the roll coolant supply pipe 28 has left side (close to the center line C). The roll cooling nozzle 27 is attached to the slab coolant supply pipe 19 and the roll cooling nozzle 27 attachment side to the roll coolant supply pipe 28. It is against the right and left. If the mounting sides of the slab cooling nozzle 18 and the roll cooling nozzle 27 are opposite to each other in this way, the cooling nozzle 18 and the roll cooling nozzle 27 are moved along the center line C passing through the center of the slab S in the width direction. It becomes possible to arrange them, and it is possible to reliably cool these by injecting mist from the respective nozzles to the center of the slab S and the guide roll 8.

  On the other hand, the slab cooling nozzle 18 is arranged between the guide rolls 8 arranged in the longitudinal direction, and is configured to inject mist onto the slab S from the nozzle tip 24a inserted between these rolls 8. On the other hand, the roll cooling nozzle 27 is provided between the slab cooling nozzles 18 and the guide roll 8 from the nozzle tip 24b attached at a position where the distance from the outer peripheral surface of the guide roll 8 becomes constant. Therefore, the mounting position of the slab cooling nozzle 18 and the mounting position of the roll cooling nozzle 27 are shifted from each other in the longitudinal direction. That is, the slab cooling nozzle 18 and the roll cooling nozzle 27 have a staggered arrangement in which the respective nozzles are alternately arranged in the longitudinal direction, and these nozzles do not cause positional interference in the longitudinal direction. .

  Since the slab cooling nozzle 18 and the roll cooling nozzle 27 extend from the outer side of the frame 7 to the inner slab S so as to cross the frame 7, the width direction or thickness of these nozzles is not limited. Some cross the second frame 14 attached along the direction. Therefore, the second frame 14 of the present invention is formed with a nozzle insertion port 33 that is cut out in a circular or semicircular shape at a position that intersects the slab cooling nozzle 18 or the roll cooling nozzle 27. If such a nozzle insertion port 33 is formed in the second frame 14, the nozzle tip 24 of the slab cooling nozzle 18 or the roll cooling nozzle 27 is inserted into the nozzle insertion port 33 and approaches the slab S or the guide roll 8. Therefore, the slab cooling nozzle 18 or the roll cooling nozzle 27 and the second frame 14 do not interfere with each other.

  That is, in the slab guide device 1 described above, the slab cooling nozzle 18 and the roll cooling nozzle 27 are intensively arranged at the center in the width direction (or the center in the thickness direction) of the slab S. The supply pipes such as the coolant supply pipes 19 and 28 and the original pipes 30 and 31 for supplying the coolant to the nozzle 27 are separately arranged on the right side and the left side of the nozzles 18 and 27. Since the nozzle 27 has a mounting structure that avoids mutual positional interference such that the mounting sides are opposite to each other on the left and right sides and are arranged in a staggered manner in the longitudinal direction, the piping structure becomes compact and installation space is reduced. It can be easily installed in a narrow area where there is no room.

  Further, in the slab guide device 1 described above, the slab cooling nozzle 18 and the roll cooling nozzle 27 are arranged so as not to interfere with each other (staggered arrangement), and the coolant supply pipes 19 and 28 and the original piping are arranged. Since the arrangements 30 and 31 do not interfere with each other, it is not necessary to use elbow type or bend type nozzles for either the slab cooling nozzle 18 or the roll cooling nozzle 27. Therefore, in the slab guide device 1 described above, straight nozzles can be used for both of the nozzles 18 and 27, so that the mist can be sprayed evenly and the nozzle can be easily manufactured. It is also possible to attach the nozzle tip 24) with high accuracy.

  As shown in FIG. 7, among the plurality of slab coolant supply pipes 19, the slab coolant supply pipe 19 provided on the most upstream side is located upstream in the vicinity of the upper end of the slab coolant supply pipe 19. Since the roll stand and the mold 5 adjacent to each other approach, the upper end of the slab coolant supply pipe 19 may not be able to extend sufficiently upward due to positional interference with these. In such a case, the slab cooling nozzle 18 attached to the most upstream side of the slab coolant supply pipe 19 may be provided with a pipe 25a bent upwardly in a U-shape. Even if it has the straight pipe 25a as shown to (E) of (E), the pipe 25a can also be attached so that it may incline upwards.

  Note that positional interference with the roll stand may also be a problem for the slab coolant supply pipe 19 provided on the most downstream side. Alternatively, even in the slab coolant supply pipe 19 other than the most upstream side or the downstream side, positional interference with the frame 7 or other members may be a problem. Even in such a case, a pipe provided with a pipe 25a bent in a dogleg shape may be used, or the pipe 25a may be attached so as to be inclined upward or downward.

The present invention is not limited to the above-described embodiments, and the shape, structure, material, combination, and the like of each member can be appropriately changed without changing the essence of the invention.
In the said embodiment, except what was attached to the slab coolant supply pipe | tube 19 provided in the most upstream side, all the slab cooling nozzle 18 and the roll cooling nozzle 27 illustrated what was made into the straight type nozzle. However, a non-straight type nozzle such as an elbow type or a bend type may be used as a part of the slab cooling nozzle 18 and the roll cooling nozzle 27.

For example, in the above embodiment, the slab guide device 1 that cools the slab S and the guide roll 8 using a mist generated by mixing cooling water and air is exemplified. However, the slab guide device 1 may cool the slab S and the guide roll 8 using only cooling water as a coolant.
In this case, the slab coolant supply pipe 19 and the roll coolant supply pipe 28 are provided with only the cooling water header pipe 20a, and the slab cooling nozzle 18 and the roll cooling nozzle 27 are spray nozzles for spraying cooling water. You can also

In the present embodiment, the slab guide device 1 provided in a continuous casting facility for casting a bloom or billet as a slab S is exemplified, but the structure of the cooling means provided in the slab guide device 1 of the present invention is a slab. It can also be used for a slab guide device of a continuous casting facility for casting, etc.
In the present embodiment, the nozzle insertion port 33 in which the second frame 14 is cut out into a circular shape or a semicircular shape is illustrated. However, as the nozzle insertion port 33, the second frame 14 is formed into a circular shape or a semi-circular shape such as an oval shape or a rectangular shape. What was notched in shapes other than circular can also be used.

DESCRIPTION OF SYMBOLS 1 Cast piece guide apparatus 2 Continuous casting equipment 3 Ladle 4 Tundish 5 Continuous casting mold 6 Immersion nozzle 7 Frame 8 Guide roll 9 Cast piece cooling means 10 Roll cooling means 11 Wide surface 12 Narrow surface 13 First frame 14 Second frame DESCRIPTION OF SYMBOLS 15 Bearing part 16 Wide surface guide roll 17 Narrow surface guide roll 18 Cast piece cooling nozzle 19 Cast piece coolant supply pipe 20 Cooling water header pipe 21 Air header pipe 22 Mounting member 23 Mixing part 24 Nozzle tip part 25 Pipe 26 Nozzle tip 27 Roll Cooling nozzle 28 Roll coolant supply pipe 29 Supply pipe mounting member 30 Original pipe for slab cooling 31 Original pipe for roll cooling 32 Supply pipe mounting bolt 33 Nozzle insertion slot C Center line S Slab

Claims (4)

A guide roll that sandwiches a slab drawn from a mold provided in a continuous casting facility and guides it in the longitudinal direction, a frame that supports the guide roll on its inner peripheral surface, and roll cooling means for cooling the guide roll And a slab guide device comprising a slab cooling means for cooling the slab,
The slab cooling means includes a plurality of straight-type slab cooling nozzles for spraying a coolant onto the side surface of the slab, supplies the coolant to these slab cooling nozzles, and extends to the outer peripheral surface of the frame. A slab coolant supply pipe arranged to extend along a direction,
The roll cooling means includes a plurality of straight-type roll cooling nozzles that spray the coolant onto the guide rolls, supplies the coolant to these roll cooling nozzles, and extends along the longitudinal direction to the outer peripheral surface of the frame. A roll coolant supply pipe arranged to be
The slab cooling nozzles are respectively mounted side by side in the longitudinal direction so that the base ends thereof are connected to the slab coolant supply pipe and the tip faces the center in the width direction of the slab,
The roll cooling nozzles are respectively mounted side by side in the longitudinal direction so that the base end thereof is connected to the roll coolant supply pipe and the tip thereof faces the center in the width direction of the guide roll,
The slab coolant supply pipe is disposed on one side across the widthwise center of the slab, and the roll coolant supply pipe is disposed on the other side of the slab. Slab guide device for casting equipment.   The slab guide device for continuous casting equipment according to claim 1, wherein the slab cooling nozzle and roll cooling nozzle are alternately arranged along the longitudinal direction.   The slab coolant supply pipe and the roll coolant supply pipe are integrally provided with a coolant header pipe for supplying cooling water to each nozzle and an air header pipe for supplying air to each nozzle. 3. A slab guide device for continuous casting equipment according to claim 1, wherein the slab guide device is provided. The cooling water header pipe and the air header pipe are composed of square steel pipes having a flat cross section in a direction perpendicular to the longitudinal direction,
The slab coolant supply pipe and the roll coolant supply pipe are configured so that the square steel pipe of the cooling water header pipe and the square steel pipe of the air header pipe face each other on the long side. 4. The slab guide device for continuous casting equipment according to claim 3, wherein the side surfaces on the long side are overlapped so as to face each other.