JP4664627B2 - Continuous casting equipment - Google Patents

Description

  The present invention relates to a continuous casting facility, and more specifically, a tundish for receiving molten metal from a ladle and pouring the received molten metal into a mold is mounted. The present invention relates to improvement of a tundish cart for moving to each work position such as a pouring position and a pouring position after pouring.

  In continuous casting, the tundish is moved from the ladle to the hot water receiving position to receive the molten metal, the tundish is moved onto the mold and the molten metal is poured into the mold, and after pouring, the tundish is poured. It is common to move the tundish to each work position such as the pouring position from the ladle, the pouring position to the mold, the pouring position after pouring, etc. The tundish cart is used.

  The above-mentioned tundish cart has the basic functions of loading and moving for loading and transporting the tundish, and aligning function for aligning the injection position between the tundish nozzle and the mold to the mold center. As functions that have been performed, there are a lifting function for raising and lowering the tundish, and a tundish weighing function for weighing the amount of molten steel in the tundish.

  On the other hand, in the above-mentioned tundish cart, for example, Japanese Utility Model Publication No. 7-50044 (Patent Document 1), Japanese Patent Application Laid-Open No. 7-24556 (Patent Document 2), Japanese Patent Application Laid-Open No. 10-146653 (Patent Document 3), etc. There are various configurations as disclosed.

  The tundish cart disclosed in FIG. 1 to FIG. 3 of Patent Document 1 or FIG. 3 of Patent Document 2 is provided with wheels on the bottom surface of the cart body formed in a rectangular shape, and is laid in a direction orthogonal to the drawing direction of the slab. The structure is such that a tundish can be loaded on the rail on the cast-in floor.

  However, when the rails are laid on the casting floor as described above, the side where the ladle for pouring the tundish does not come upward (hereinafter referred to as the casting work side) at the start of casting, etc. The situation inside the mold is visually checked or the slot is removed from the mold during casting. In addition to the poor contact with the mold during casting, molten steel flows out of the casting floor. When an accident occurs, there is a concern that the rail will be affected by troubles such as the molten steel that has flowed out. In addition, when the above-mentioned alignment function, lifting / lowering function, and weighing function are required, a device having these functions is mounted on the cart body on which the tundish is loaded, and the cart body becomes large. .

  Further, the tundish cart disclosed in FIG. 1 and FIG. 2 of Patent Document 2 is such that the cart body has a horizontal loading frame on which the tundish is loaded, and a vertical standing on an end parallel to the traveling direction of the loading frame. In addition to the frame, the wheels provided on the lower surface of the loading frame on the anti-casting work side are laid on the rails laid on the casting floor, and the wheels provided on the upper part of the vertical frame are laid on the casting work side. Each of the rails is structured to be able to travel.

  In the cart having the structure of Patent Document 2, only the casting work side rail is laid on the overhead, and the anti-casting work side is laid on the casting floor. Although improved, if the tundish after tilting is tilted and rejected, the tundish tilts interferes with the rail on the anti-casting work side, so the tundish is tilted. Therefore, it is not suitable for a continuous casting process in which tundish is reused hot. Also, in the cart having this structure, when the alignment function, the lifting / lowering function, and the weighing function are required, a device having these functions is mounted on the tundish loading frame. The whole becomes large.

  Moreover, in the tundish cart disclosed in FIGS. 1 to 3 of Patent Document 3, the cart body has a horizontal loading frame on which the tundish is loaded, and a vertical frame that is erected on an end parallel to the traveling direction of the loading frame. A frame and a horizontal frame horizontally provided on the side opposite to the loading frame of the upper end portion of the vertical frame and provided with traveling wheels on both sides parallel to the traveling direction, and traveling wheels provided on the horizontal frame, The structure is provided so as to be able to run on rails on the casting work side and the anti-casting work side installed above the casting floor (above the casting worker). The cart having the structure of Patent Document 3 will be described as a cantilever tundish cart.

  The above-mentioned cantilever type tundish cart has a structure in which the rails on the casting work side and the anti-casting work side are provided above the head, and no rails are laid on the casting floor. Is improved and casting workability is improved. Further, the tundish can be moved without being affected by the molten steel spill accident on the cast-in floor. Further, there is no interference when the tundish is tilted, and it can be said that the structure is suitable for a continuous casting process in which the tundish is tilted and the tundish is reused hot.

However, in this cantilever type tundish cart, the loading frame, the vertical frame and the horizontal frame are constructed in an integrated structure, and the loading frame is provided with a tundish tilting device. When installing a device, alignment device (centering device), weighing device, etc., it must be further installed on the loading frame, and it is a complicated structure to install these devices in a limited space on the loading frame. It is very difficult to be forced. Even if equipped, the loading frame is large and heavy, and the vertical frame erodes the area on the casting work side and becomes an obstacle when running the tundish cart. In addition, the amount of overhang due to cantilevering of the vertical frame and the stacking frame increases, and the frame becomes larger in order to secure the strength of each part frame. In addition, since the load on the rail increases, the steel frame is also enlarged.
Japanese Utility Model Publication No. 7-50044 (FIGS. 1 to 3) Japanese Patent Laid-Open No. 7-24556 (FIG. 1) JP-A-10-146653 (FIGS. 1 to 3)

  The present invention has been made to solve the problems of the cantilevered tundish cart based on the circumstances described in the background art, and its purpose is to make the loading frame large. The present invention provides a continuous casting facility including a tundish cart that can be equipped with a tundish lifting device, alignment device, weighing device, and tilting device.

The present invention for achieving the above object is a continuous casting facility having the following configuration. In other words, the continuous casting facility according to the present invention (claim 1), a tundish for pouring molten metal into the installed mold casting floor, tundish carriage for moving the tundish, the molten metal into the tundish pouring in that ladle and a continuous casting facility comprising a ladle transport device for moving the ladle, the tundish carriage is movably disposed by road wheels along the rails provided above the casting floor together with the tundish carriage is loaded with a horizontal frame supported on the road wheels, a vertical frame which is connected to one end of the horizontal frame, said tundish provided at the lower portion of the vertical frame loading and a frame, with further provision of the loading frame vertically movably through a lifting means along said vertical frame, before the lifting means this Horizontal frame, said longitudinal frame, it includes any of the loading frame, in addition, be held in a desired angle the longitudinal frame and the horizontal frame while connecting the horizontal frame and the vertical frame rotatably it is obtained by a configuration in which Ru includes a frame crossing angle holding means for.

In the above configuration, the loading frame is provided so as to be movable up and down along the vertical frame via the lifting means, and the lifting means is provided in any of the horizontal frame, the vertical frame, and the loading frame. There is no need to install a lifting device directly on the frame, the loading frame can be made compact, and the structure of the lifting device itself can be simplified. Furthermore, since the load on the rail as well as the vertical and horizontal frames constituting the tundish cart can be reduced, the steel frame can be made compact. Further, since the provided running wheels in a horizontal frame, it is possible to travel on rails provided above the concrete floor cast a tundish carriage, cast because there is no rail to concrete floor, mold during casting operations Good close to. In the above-described configuration, the horizontal frame and the vertical frame are rotatably connected, and frame crossing angle holding means for holding the horizontal frame and the vertical frame at a desired angle is provided. By configuring in this way, it is not necessary to directly install the alignment device in addition to the lifting device, and the loading frame can be made more compact.

  According to the present invention, the tundish elevating device, aligning device, weighing device, and tilting device can be provided in a tundish cart without the need to make a large loading frame, in addition to being close to the mold during casting. Can be installed. Further, since the tundish weighing device is not necessarily provided as a continuous casting facility, the loading frame can be made more compact when it is not necessary.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a continuous casting facility according to the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, FIG. 3 is an enlarged explanatory view of a Y portion in FIG. 2, and FIG. FIG. 5 is an enlarged explanatory view, FIG. 5 is an AA sectional view showing one side of FIG. 4 omitted, and FIG. 6 is a plan view showing one half of FIG. 4 omitted.

  As shown in FIGS. 1 and 2, a casting mold 1 is installed on the casting floor 1, and two ladles 3 are supported on the casting side of the casting mold 2 and can be alternately moved onto the casting mold. A conveying device 4 is arranged, and a support column 5 is erected on the casting work side, and rails 8 and 9 are installed on the support column 5 via mounts 6 and 7. The rails 8 and 9 are provided with a tundish cart 11 that is mounted with a tundish 10 and moves along the rails 8 and 9. Moreover, in this example, the waste disposal equipment 12 is arrange | positioned adjacent to the ladle conveyance apparatus 4 at the anti-casting work side.

  The tundish cart 11 includes a horizontal frame 13, a vertical frame 14, a loading frame 15, and a frame crossing angle holding unit 16. The horizontal frame 13 and the vertical frame 14 are rotatably connected via a pin 17. The horizontal frame 13 is provided with a traveling wheel 18 and a traveling wheel 19, and in this example, the traveling wheel 18 is used as a driving wheel so as to be able to travel on its own. The traveling wheel 19 is configured to prevent the horizontal frame 13 from being lifted.

  The loading frame 15 is a frame on which the tundish 10 is loaded. In this example, the loading frame 15 is vertically moved along the vertical frame 14 by a lifting wheel 20 traveling on the rear surface of the vertical frame 14 and a lifting wheel 21 traveling on the front surface. It can be moved up and down freely and is moved up and down by a lifting drive device 22 such as a worm jack.

  In addition, the loading frame 15 is provided with a receiving portion 24 and a tilting device 25 that receive the second trunnion 23 that serves as a rotation center when the tundish 10 is tilted. The receiving unit 24 is provided on the loading frame 15 via the load cell 26 on the loading frame 15 and is configured to be capable of weighing tundish. On the other hand, the tilting device 25 includes a tilting hydraulic cylinder 27 provided on the loading frame 15 and a U-shaped hardware 28 attached to the tip of the rod of the tilting hydraulic cylinder 27. One trunnion 29 is received by the U-shaped hardware 28. When the tundish 10 is tilted, the U-shaped hardware 28 is pushed up and tilted. In this example, the alignment mechanism (such as the frame crossing angle holding means 16) and the lifting mechanism (such as the lifting drive device 22) of the tundish 10 are not directly arranged on the tundish stacking portion of the stacking frame 15. The device (load cell) 26 and the tilting device 25 can be easily arranged.

  The frame crossing angle holding means 16 includes a link 30 rotatably provided on the horizontal frame 13, a link 31 rotatably provided on the vertical frame 14, and a worm provided on a joint portion 32 of the links 30 and 31. A jack type centering driving device 33 is provided. In this case, it is desirable that the centering driving device 33 is arranged so that the axis of the centering driving device 33 is in a direction substantially orthogonal to the axial direction of the link 30 and the link 31. By arranging in this way, the driving force required for centering is a component of geometric force, so very little force may be required. Therefore, the worm jack and the electric motor constituting the centering driving device 33 are small in size. Can be

  By providing the frame crossing angle holding means 16, a clockwise rotational moment acts on the vertical frame 14 around the pin 17 due to the weight of the tundish 10 and the loading frame 15. Only the tensile force (tension) acts on the link 31, and the axis of the link 30 and the axis of the link 31 tend to be linear. However, if the bending angle between the link 30 and the link 31 is reduced by driving the centering drive device 33 back and forth, the rotation axis 34 of the link 30 and the horizontal frame 13, the link 31 and the vertical frame 14 The linear distance from the rotation axis 35 decreases, the vertical frame 14 rotates counterclockwise around the pin 17 as the center of rotation, and the tundish 10 slightly moves rightward in FIG.

  The alignment mechanism by the frame crossing angle holding means 16 is a “centering mechanism” for aligning the discharge port of the tundish 10 with the center of the mold 2. The centering operation causes the tundish 10 to be inclined at a minute angle. However, the required slide amount may be about ± 10 mm, and the distance between the pin 17 that is the center of rotation and the discharge port of the tundish 10 is sufficient. The tundish inclination angle is a level that can be ignored in practice. The alignment by the frame crossing angle holding means 16 is centering in the direction orthogonal to the traveling direction of the tundish cart 11, and centering in the traveling direction of the tundish cart 11 is performed by traveling of the tundish cart 11.

  In the above-described embodiment, the case where the lifting drive device 22 is provided on the vertical frame 14 via the bracket 36 by way of an example of a worm jack has been illustrated and described. However, the horizontal frame 13 and the vertical frame 14 are rotated. If they are constructed integrally, they may be provided on the horizontal frame 13. When the elevating drive device 22 uses a rack and pinion mechanism, the rack may be provided along the vertical frame 14, and the pinion and its drive motor may be provided on the loading frame 15 to be raised and lowered. As described above, the elevating drive device 22 can be provided on any one of the horizontal frame 13, the vertical frame 14, and the stacking frame 15. When the horizontal frame 13 and the vertical frame 14 are integrated without rotating, the aligning device of the tundish 10 is provided on the stacking frame 15 as in the prior art.

  In the above embodiment, the frame crossing angle holding means 16 has been described with reference to the example in which the link 30, the link 31, and the centering drive device 33 are disposed above the horizontal frame 13. You may arrange in the side. Further, the centering driving device 33 is driven forward and backward to change the bending angle of the axis of the link 30 and the link 31, and by changing the bending angle, the angle of the horizontal frame 13 and the vertical frame 14 is changed to align the tundish 10. However, if alignment is possible in advance, the link 30 and the link 31 are provided with a single member (the tension member is provided on the upper side of the horizontal frame 13 and the lower side is provided without providing the centering driving device 33). If it is provided, it may be a compression member), and a member with a different length of this member may be attached and centered, or this member may be composed of two members and centered using a turnbuckle mechanism. You may do it.

In the continuous casting equipment having the above configuration, the loading frame 15 of the tundish 10 is not provided with a lifting device (a structure including the lifting driving device 22 and the lifting wheels 20, 21). In addition, the structure of the lifting device itself can be simplified. Further, since the load on the rails 8 and 9 as well as the vertical frame 14 and the horizontal frame 13 constituting the tundish cart 11 can be reduced, the steel frame can be made compact. Further, since the provided road wheels 18, 19 to the horizontal frame 13, it is possible to travel on rails 8, 9 arranged above the concrete floor 1 cast tundish carriage 11, cast on concrete floor 1 Since there is no rail, close contact with the mold 2 during casting is improved.

  FIG. 7 is an explanatory diagram for explaining the tundish elevating operation and tilting operation at each operation position from the casting operation to the nozzle maintenance operation in the continuous casting equipment, where a is the casting operation state, b indicates the state of conveyance to the waste disposal work site, c indicates the state of waste disposal, and d indicates the state of nozzle maintenance work.

  In the casting operation, the tundish 10 mounted on the tundish cart 11 is moved directly above the mold 2 and then lowered to the casting position by the lifting drive device 22, and the traveling direction by adjusting the traveling direction of the tundish cart 11. The alignment of the nozzle with respect to the mold 2 is performed by the alignment in the direction perpendicular to the traveling direction by the frame crossing angle holding means 16. Further, weighing is performed by the load cell 26 whenever necessary (see FIG. 7a).

  The transport of the tundish 10 in a state of being mounted on the tundish cart 11 is performed in a state where the tundish 10 is lifted from the casting position by the lift drive device 22 (see FIG. 7b).

  In the evacuation work, the tundish 10 is tilted by the tilting device 25 at the position where the conveyance state is maintained or the height is adjusted by the lifting / lowering driving device 22, and the trashing is performed (see FIG. 7c).

  In the nozzle maintenance work, after the removal, the tilting device 25 moves the tundish 10 to a predetermined angle with the tilting device 25 returned to a predetermined angle, and then the tilting device 25 adjusts the angle of the tundish 10 to perform the nozzle maintenance. Done (see FIG. 7d).

It is a top view of the continuous casting equipment which concerns on this invention. It is XX sectional drawing of FIG. FIG. 3 is an enlarged explanatory view of a Y part in FIG. 2. FIG. 4 is an enlarged explanatory view of a Z part in FIG. 3. It is AA sectional drawing which abbreviate | omits one side of FIG. It is a top view which abbreviate | omits one side of FIG. It is explanatory drawing for demonstrating the raising / lowering operation | movement and tilting operation | movement of a tundish in each operation position from the casting operation to a nozzle maintenance operation | work in the continuous casting equipment which concerns on this invention, Comprising: a is a casting operation state, b Indicates the state of conveyance to the evacuation work site, c indicates the evacuation work state, and d indicates the nozzle maintenance work state.

Explanation of symbols

1: Casting Floor 2: mold 3: ladle 4: ladle transport device 5: strut 6,7: pedestal 8,9: Rail 10: tundish 11: tundish carriage 12: Haikasu facilities 13: horizontal frame 14 : Vertical frame 15: Loading frame 16: Frame intersection angle holding means 17: Pin 18: Traveling wheel 19: Traveling wheel 20: Lifting wheel 21: Lifting wheel 22: Lifting drive device 23: Second trunnion 24: Receiving Part 25: Tilt device 26: Load cell 27: Tilt hydraulic cylinder 28: U-shaped hardware 29: First trunnion 30, 31: Link 32: Joint part 33: Centering drive device 34, 35: Rotation axis 36: bracket

Claims (1)

Tundish for pouring molten metal into the installed mold casting floor, tundish carriage for moving the tundish, ladle for pouring the molten metal into the tundish, and a ladle transport device for moving the ladle In the continuous casting facility provided, the tundish cart is movably disposed by a traveling wheel along a rail provided above the casting floor, and the tundish cart is supported by the traveling wheel. a horizontal frame, a vertical frame which is connected to one end of the horizontal frame, and a loading frame for loading the tundish provided at the lower portion of the vertical frame, and further along the loading frame to the vertical frame provided with vertically movable via lifting means, said lifting means this horizontal frame, the vertical frame, the loading frame Either it comprises, in addition to, includes a frame crossing angle holding means for holding the desired angle the longitudinal frame and the horizontal frame while connecting the horizontal frame and the vertical frame rotatably A continuous casting facility characterized by

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