JP4441418B2 - Continuous casting mold - Google Patents

Description

  The present invention relates to a continuous casting mold having a cooling box capable of storing an electromagnetic stirring device for stirring molten steel in a mold.

  Conventionally, a method of electromagnetically stirring molten steel in a mold in order to obtain slabs with excellent surface quality by actively floating and removing non-metallic inclusions or gas contained in molten steel injected into a continuous casting mold Is known, and a mold for doing so is disclosed in US Pat.

  In the mold of Patent Document 1, a coil of an electromagnetic stirrer is provided in the upper part of the long side cooling box, and a cooling water supply header and a drainage header are provided in the lower part of the coil storage part. As a result, the electromagnetic stirring device can be arranged on the upper part of the mold, and the molten steel upper surface in the mold and the coil upper surface of the electromagnetic stirring device can be matched, so that the molten steel stirring becomes good and the slab having excellent surface quality is manufactured. Became possible.

  Further, in the mold of Patent Document 1, a copper plate is stretched over the entire surface of the molten steel side front plate of the cooling box, and the cooling effect is enhanced by passing cooling water through the copper plate, which is injected into the mold. The molten steel is cooled and solidified. Since this copper plate is always in contact with high-temperature molten steel, damage such as cracking or melting is likely to occur, and if damage occurs, it must be replaced with another copper plate.

  However, in the mold of Patent Document 1, the cooling box and the copper plate have an integral structure, and when replacing the copper plate, it is necessary to replace the cooling box integrally with the cooling box. There was a problem that it took time. Furthermore, since the long side cooling box incorporates an expensive electromagnetic stirring device, when removing the long side cooling box from the continuous casting machine when replacing the copper plate, it was necessary to remove the electromagnetic stirring device together. . At this time, if the electromagnetic stirring device was removed from the cooling box with the old copper plate attached to the cooling box with the new copper plate attached, and the removed electromagnetic stirring device was attached, it would take a lot of time and the productivity of the continuous casting equipment In general, an electromagnetic stirrer prepared in advance as a spare was attached. Thus, a preliminary electromagnetic stirrer must be prepared, and the initial investment when introducing the electromagnetic stirrer has been enormous.

  On the other hand, Patent Document 2 discloses a mold in which a variable short side frame to which a short side copper plate is fixed is detachable from a fixed short side frame. Specifically, the variable short side frame is provided with a bracket and the fixed short side frame is provided with a bracket holder. When the variable short side frame is fixed to the fixed short side frame, the variable short side frame is provided with the variable short side frame. After the bracket is engaged with a bracket receiver provided on the fixed short side frame and the lower end is positioned, the upper end is fixed with a bolt.

  However, in the mold of Patent Document 2, it is necessary to provide a bracket on the variable short side frame and a bracket receiver on the fixed short side frame, and the structure becomes complicated. Furthermore, when fixing the variable short side frame to the fixed short side frame, as described above, it is necessary to engage the bracket with the bracket receiver, and after that, it is necessary to fix the upper end with a bolt. It takes time to replace the copper plate.

Moreover, although the casting_mold | template with which the copper plate was detachable was also disclosed by patent documents 3, 4, all have the structure complicated similarly to the casting_mold | template of patent document 1, and it takes time to exchange a copper plate. I have a problem.
Japanese Utility Model Publication No. 58-49172 JP-A-4-224049 JP 2002-239686 A Japanese Utility Model Publication No. 63-157452

  SUMMARY OF THE INVENTION An object of the present invention is to provide a continuous casting mold with a simple structure that can easily replace a copper plate while leaving a cooling box in a continuous casting machine.

  The present invention provides a continuous casting mold in which the copper plate fixing plate and the copper plate are detachably attached to the molten steel side of the cooling box, and the copper plate fixing plate is provided with an upper fixing member and a lower fixing member positioned above and below the cooling box, An upper support member and a lower support member that are respectively engageable with the upper fixing member and the lower fixing member are provided on the upper and lower surfaces of the cooling box, and an elevating mechanism is provided on the upper fixing member or the lower fixing member. Thus, the upper fixing member and the lower fixing member are moved up and down to engage and disengage the upper fixing member and the lower fixing member from the upper support member and the lower support member.

  In the present invention, an engaging inclined surface is formed at the tip of the upper fixing member and the lower fixing member, and a supporting inclined surface that faces the engaging inclined surface is formed on the upper supporting member and the lower supporting member, When the upper fixing member and the lower fixing member are lifted by an elevating mechanism, the engagement inclined surface slides in contact with the support inclined surface so that the copper plate fixing plate and the copper plate move toward the cooling box. can do.

  According to the present invention, the copper plate fixing plate and the copper plate can be attached and detached by a simple operation of operating the lifting mechanism. Further, since the mold only includes the upper fixing member, the lower fixing member, the upper supporting member, the lower supporting member, and the lifting mechanism, the structure is simplified.

  For this reason, in a state where the long side cooling box containing the expensive electromagnetic stirring device is left in the continuous casting machine, the long side copper plate can be easily replaced in a short time, so that the productivity of the continuous casting equipment is not hindered. Since the number of necessary spare parts for the expensive magnetic stirring device can be reduced, the initial investment when introducing the magnetic stirring device can be reduced.

  Embodiments of the present invention will be described below on the basis of examples shown in the drawings.

  FIG. 1 is a cross-sectional view showing an embodiment of a continuous casting mold of the present invention, and FIG. 2 is a side view showing a copper plate fixing plate and a copper plate portion that are attached to and detached from the continuous casting mold shown in FIG.

  In FIG. 1, a front plate 2 is welded and fixed to the molten steel A side of a cooling box (long side cooling box) 1 installed on a continuous casting machine, and a copper plate fixing plate 3 is attached to and detached from the front plate 2. The copper plate 4 is fixed to the copper plate fixing plate 3 by bolts (not shown).

  The copper plate fixing fret 3 is provided with an upper fixing member 5 and a lower fixing member 6 positioned above and below the cooling box 1, and engaging inclined surfaces 5 a and 6 a are formed at the tips of the upper fixing member 5 and the lower fixing member 6. ing. A sealing material 13 is attached to the surface of the copper plate fixing plate 3 facing the front plate 2.

  On the other hand, the upper and lower surfaces of the cooling box 1 are provided with an upper support member 7 and a lower support member 8 that can be engaged with the upper fixing member 5 and the lower fixing member 6, respectively. Support inclined surfaces 7 a and 8 a are formed so as to face the engaging inclined surfaces 5 a and 6 a formed on the upper fixing member 5 and the lower fixing member 6.

  Furthermore, the upper fixing member 5 is provided with jack bolts 9 as an elevating mechanism, and the lower fixing member 6 is attached with a foot roll 10 which is the uppermost roll of the support roll group under the mold.

  The cooling water supply header 11 and the drainage header 12 are provided in the lower part of the cooling box 1, and the cooling water passes from the water supply header 11 to the cooling groove 4 a of the copper plate 4 through the water supply hole 3 a of the copper plate fixing plate 3. It flows into the drainage header 12 via the drainage hole 3 b of the copper plate fixing plate 3. An electromagnetic stirring device (not shown) is accommodated in the cooling box 1.

  In the above configuration, when attaching the copper plate fixing plate 3 and the copper plate 4 to the front plate 2 on the molten steel A side of the cooling box 1, first, the upper fixing member 5 and the lower fixing member 6 provided on the copper plate fixing plate 3 are respectively set. It is located below the upper support member 7 and the lower support member 8. Then, the jack bolt 9 is operated to raise the upper fixing member 5 and the lower fixing member 6 with respect to the cooling box 1. Then, the engaging inclined surface 5a of the upper fixing member 5 and the supporting inclined surface 7a of the upper supporting member 7 and the engaging inclined surface 6a of the lower fixing member 6 and the supporting inclined surface 8a of the lower supporting member 8 face each other. . Further, when the upper fixing member 5 and the lower fixing member 6 are raised by operating the jack bolt 9, the engaging inclined surfaces 5a and 6a slide on the supporting inclined surfaces 7a and 8a, so that the upper fixing member 5 and the lower fixing member 5 The fixing member 6 moves obliquely upward to the left in FIG. Along with this, the copper plate fixing plate 3 is also moved obliquely upward to the left (in the direction toward the front plate 2 of the cooling box 1), and the copper plate fixing plate 3 and the copper plate 4 are placed with the sealing material 13 on the front side of the front plate 2. It is fixed tightly. In the embodiment, the support plate 14 is used to securely fix the copper plate fixing plate 3 to the front plate 2.

  When removing the copper plate 4 for replacement, the jack bolt 9 is operated in the opposite direction to lower the upper fixing member 5 and the lower fixing member 6 with respect to the cooling box 1. Then, the engagement between the upper fixing member 5 and the upper support member 7 and the engagement between the lower fixing member 6 and the lower support member 8 are released. As a result, the copper plate fixing plate 3 and the copper plate 4 can be removed.

  When replacing the copper plate as described above, the long side copper plate can be easily replaced in a short time while leaving the long side cooling box containing the electromagnetic stirrer on the continuous casting machine.

It is sectional drawing which shows the Example of the casting mold for continuous casting of this invention. It is a side view which shows the copper plate fixing plate and copper plate part which are attached or detached in the casting mold for continuous casting shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooling box 2 Front plate 3 Copper plate fixing plate 3a Water supply hole 3b Drain hole 4 Copper plate 5 Upper fixing member 5a Engagement inclined surface 6 Lower fixing member 6a Engagement inclined surface 7 Upper support member 7a Support inclined surface 8 Lower support member 8a Support inclined surface 9 Jack bolt 10 Foot roll 11 Water supply header 12 Drainage header 13 Sealing material 14 Support bolt A Molten steel

Claims (2)

In a continuous casting mold in which a copper plate fixing plate and a copper plate are detachably attached to the molten steel side of the cooling box,
The copper plate fixing plate is provided with an upper fixing member and a lower fixing member positioned above and below the cooling box, and an upper support member and a lower part that are engageable with the upper fixing member and the lower fixing member on the upper and lower surfaces of the cooling box, respectively. Providing a support member,
Furthermore, an elevating mechanism is provided on the upper fixing member or the lower fixing member,
The upper fixing member and the lower fixing member are moved up and down by the elevating mechanism, and the upper fixing member and the lower fixing member are engaged with and released from the upper supporting member and the lower supporting member. Casting mold.   An engaging inclined surface is formed at the tip of the upper fixing member and the lower fixing member, and a supporting inclined surface that faces the engaging inclined surface is formed on the upper supporting member and the lower supporting member, and the upper and lower portions are formed by an elevating mechanism. The engagement inclined surface slides in contact with the support inclined surface when the fixing member and the lower fixing member are raised, and the copper plate fixing plate and the copper plate are moved toward the cooling box. The mold for continuous casting as described.

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