JPS6013578Y2 - Split type ingot guide roll in continuous casting equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a split type ingot guide roll in continuous casting equipment.

Continuous casting equipment, especially curved continuous casting equipment, consists of a mold that primarily cools molten metal such as molten steel, and an arbitrarily smooth geometric mold that guides the ingot that comes out of the mold from the vertical direction to the horizontal direction. It consists of a secondary cooling zone consisting of a large number of ingot guide rolls arranged along a curve, and pinch rolls for continuously pulling out the ingot cooled in this secondary cooling zone.

The ingot guide rolls in the secondary cooling zone are prone to bulging because the ingots in this zone contain unsolidified molten steel, so it is necessary to shorten the roll pitch to prevent bulging. At the same time, it is necessary to provide an interval between the rolls for disposing a cooling water spray for cooling the ingot.

Therefore, small-diameter rolls are preferably used as ingot guide rolls, but small-diameter rolls have a small supporting force in the width direction (
There is a risk of bending due to the static pressure of the molten steel in the ingot at the center (in the roll axis direction).

Therefore, it is necessary to provide a roll support part at the middle part in the width direction, and therefore a split roll method is adopted in which the roll is divided in the width direction and each roll is supported by a bearing.

However, when the ingot width is 240-class, the roll is divided into three or more parts, and in that case, it is difficult to install a device for supplying and discharging cooling water for roll cooling inside the roll in the center.
Conventionally, a roll can only be divided into two parts.

Therefore, the diameter of the rolls becomes large depending on the length of the rolls, and the pitch between the rolls also becomes large, resulting in a sacrifice of bulging of the ingots, which inevitably leads to a decline in the quality of the ingots.

This idea was made in view of the above problem, and the joint part of the solid bearing box that supports the middle part side of the roll divided in the width direction is used as a cooling water relay box, and the side part of the roll is separated from the side bearing box. Cooling water is supplied and drained through the inside of the roll and through the cooling water relay box of the solid bearing box to the inside of the central roll, making it possible to divide the roll into three or more parts in the width direction, making it possible to reduce the diameter of the roll and improve the flow direction of the ingot. It is an object of the present invention to provide a split type ingot guide roll for continuous casting equipment, which has a short pitch between the rolls, prevents bulging of the ingot, and is capable of producing high grade steel.

This invention will be explained in detail below with reference to embodiments shown in the drawings.

The ingot guide roll of the embodiment is divided into three parts in the width direction (direction perpendicular to the ingot advancing direction), and is divided into a left roll 1, a center roll 2, and a right roll 3.

The outer part 4a of the spindle 4 of the left roll 1 is supported by a bearing 6 provided in an outer bearing box 5 fixed to the left end, and the inner part 4b of the spindle 4 is supported by a solid bearing fixed to the center side. box 7
It is supported by a bearing 8 provided inside.

The center roll 2 supports the left side 9a of the support shaft 9 by a bearing 11 provided in a solid bearing box 10 fixed adjacent to the solid bearing box 7, and supports the right side 9b of the support shaft 9 in the middle. Real bearing box 12
It is supported by a bearing 13 provided inside.

The right side roll 3 has the left side 14a of the support shaft 14 supported by a bearing 16 provided in a solid bearing box 15 fixed adjacent to the solid bearing box 12, and the right side 14a of the support shaft 14.
Bearing 1 provided in the outer bearing box 17 with b fixed to the right end
Supported by 8.

As shown in the figure, there is a relay inwardly from the adjacent end of each solid bearing box 7, 10 at the joint with the cooling water joint box 30 arranged adjacent to the left roll 1 and the center roll 2. The outer plates 20.21 are fitted and fixed into the solid bearing boxes 7, 10 through packings 22.23, respectively, and a hollow portion 24 having a distance of 1 is formed between them and the intermediate outer plate 20.21.

A hole 20a is provided in the center of each of the intermediate outer panels 20 and 21.
, 21a, and gaskets 22a and 23a are inserted into the holes 20a and 21a, while roll shafts 4b and 9a are respectively provided.
Intermediate inner plates 27 and 28 having a U-shaped cross section and fixed with bolts 25 and 26 are fitted to the end faces of the hollow part 24 with the recesses facing each other, thereby forming a wide hollow part 29 that communicates with the inside of the hollow part 24. ,
The relay outer plates 2o and 21 and the intermediate inner plates 27 and 28 surround both left and right sides, and the bearing boxes 7 and 10 surround the upper and lower and front and rear sides, forming a cooling water relay box 3° having a hollow portion 24 and 29 inside. ing.

Gaskets 31 are interposed on adjacent surfaces of the bearing boxes 7 and 9 to prevent leakage of cooling water that is supplied and drained into the inside of the submerged cooling submersion box 30 as will be described later.

A cooling water passage 32 is located in the center of the intermediate inner plate 27, 28.
．． A cooling water passage 34 is provided to penetrate through the cooling water passage 33 and communicate with the cooling water passage 32, and a cooling water passage 34 is provided through the axial center of the roll shaft 4b, the roll 1, and the roll shaft 4a. A cooling water passage 35 is provided in communication with the roll shaft 9a of the central roll 2, passing through the roll 2 and reaching the center of the roll shaft 9b, so that the cooling water passages 34, 32, and 35 are connected in series.

The outer end opening of the cooling water passage 34 communicates with a supply/discharge pipe 36 extending through the axial center of the outer end wall 5a of the outer bearing box 5. Cooling water box 3 installed in
It is connected to 7.

A cooling water supply pipe 38 is placed from above the cooling water box 37 at the center of the supply/discharge pipe 36 and the cooling water passages 34, 32, 33. Cooling water is supplied and flows out from the cooling water supply pipe 38 at the tip of the cooling water passage 35 between the supply pipe 38 and the inner wall of the passage, so that the cooling water flows between the supply pipe 38 and each cooling water passage 35 . 33. 32.
The cooling water is returned to the cooling water box 37 through a cooling water return path 39 formed between the cooling water return path 39 and the inner wall of the cooling water box 34, and is discharged from a discharge port 37a provided below the cooling water box 37.

On the other hand, on the right roll 3 side, the roll shaft 14b10-
A cooling water passage 40 is provided which passes through the axis of the roll shaft 3 and extends to the center of the roll shaft 14a, and the outer end opening of the cooling water passage 40 is provided through the outer bearing box 17 in the same way as the left outer side. It communicates with a cooling water pipe 41, and the cooling water pipe 41 communicates with a cooling water box 42 attached to the outside of the outer bearing box 17.

A cooling water supply pipe 43 passing through the center of the cooling water pipe 41 and the cooling water passage 40 is arranged from above the cooling water box 42, and cooling water is supplied through the cooling water supply pipe 43, and the cooling water flowing out from the opening at the tip of the pipe is The water is refluxed through a reflux path 44 between the outer wall of the water pipe and the inner wall of the passage, and is discharged from a discharge port 42a below the cooling water box 42.

In the cooling device having the above structure, the central roll 2 includes:
From the roll 1 side on the left side, cooling water is supplied and drained from a supply pipe 38 through a return path 39 via a cooling water junction box 30 formed at the junction between the solid bearing boxes 7 and 10.

In the above embodiment, the roll is divided into three parts in the width direction, but when the roll is divided into four parts, cooling water is supplied from the outer roll sides adjacent to the two central rolls using the same configuration as in the above embodiment. Water supply and drainage can be done.

Alternatively, the cooling water may be sequentially sent from one of the outer rolls to the two central rolls via a relay cooling box.

Similarly, the roll can also be divided into four or more parts in the width direction.

As is clear from the above explanation, according to the cooling device according to this invention, the cooling water joint box is provided at the joint part of the adjacent solid bearing boxes that support the central part of the roll divided in the width direction. , cooling water can be supplied and drained from the side rolls to the center roll more easily and without taking up space.

Therefore, the roll can be divided into three or more parts in the width direction, and as a result, the roll diameter can be reduced and the pitch between the rolls can be shortened.

Therefore, the ingot supported and guided by the rolls can be prevented from bulging, and has the advantage of being able to produce high quality slabs.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view of a main part showing a cooling device for an ingot guide roll according to this invention, and FIG. 2 is an enlarged view of the main part of FIG. 1. 1... Left roll, 2... Center roll, 3... Right roll, 5, 17... Outer bearing box, 7, 10, 12. 15... Solid bearing box, 20, 21... Intermediate outer plate, 27, 2
8... Intermediate inner plate, 30... Cooling water coupling box, 32, 33, 34, 35. 40... Cooling water passage, 38, 43...・Cooling water supply pipe.

Claims (1)

[Scope of utility model registration request] To divide the ingot guide roll in continuous casting equipment into three or more parts (1, 2°, 3, etc.) in the width direction perpendicular to the ingot advancing direction, and to support the adjacent roll axis of each divided roll. The relay part of the cooling water relay box 30 disposed adjacent to the solid bearing boxes 7, 10 connects the intermediate outer plates 20.21 inwardly from the adjacent ends of the solid bearing boxes 7, 10 through packings 22.23, respectively. 10 to form a hollow part 24 with a gap of 1 between the intermediate skin plates 20.21, and holes 20a and 2 in the center of both intermediate skin plates 20.21, respectively.
1a, and gaskets 22a are provided in the holes 20a and 21'a.
, 23a are interposed therein, while intermediate inner plates 27.28 each having a U-shaped cross section and fixed to the end face of the roll shaft 4b*9a with bolts 25.26 are fitted with the concave portions facing each other, thereby forming the hollow portion 24. A wide hollow part 29 is formed which communicates with the inside of the shaft, and the left and right sides are surrounded by the intermediate outer plates 20 and 21 and the intermediate inner plates 27 and 28, and the upper and lower and front and rear sides are surrounded by the bearing boxes 7 and 10. A cooling water junction box 30 having hollow portions 24 and 29 is formed in the bearing boxes 7 and 10, and a packing 31 is interposed on the adjacent surfaces of the bearing boxes 7 and 10.
7.28 is provided with a cooling water passage 32.33 passing through it, and is communicated with the cooling water passage 32, so that cooling water is provided at the center of the roll shafts 4a, 4b, 9at 9b and the rolls 1, 2. A split type ingot guide roll for continuous casting equipment, characterized in that passages 32, 33, 34, and 35 are provided through the passages 32, 33, 34, and 35 so as to communicate with each other.