JPH08155615A - Device for drawing out cast slab in continuous casting apparatus - Google Patents

Abstract

PURPOSE: To easily adjust the rotation of driving rolls even in the case of changing the peripheral speed of the driving rolls caused by wearing by arranging a motor for driving and a reducer to each set of the upper and the lower rolls in a pinch roll unit and driving the upper and the lower rolls. CONSTITUTION: Two sets of the upper and the lower one pair of the driving rolls are assembled in the interval along the cast slab guide passage 6 in a frame 5 of the pinch roll unit 4 of a cast slab drawing device 3 and rotation- driven with the driving devices 24A, 24B arranged on the upper part of steel frame 10 through a long universal spindles 12A, 12B. The driving devices 24A, 24B are constituted with flange fitting type motors 25A, 25B and input follow shaft type reducers 26A, 26B to individually control the peripheral speed of each set of the upper and the lower of driving rolls. Even if the driving roll is worn between the sets of the upper and the lower driving rolls and the peripheral speed is changed caused by the development of the difference between the roll diameters, this adjustment can easily be executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab drawing apparatus for continuous casting equipment, and more particularly to a slab drawing apparatus for continuous casting equipment for a plurality of strands.

[0002]

2. Description of the Related Art A conventional cast strip drawing apparatus in a continuous casting facility is proposed in, for example, Japanese Patent Publication No. 62-32019. As shown in FIG. 3 and FIG. 4, this prior art is arranged at three locations (denoted by reference numeral 3 or 3A, 3B, 3C) between the slab guide roll units 2 below the mold 1 from below the mold 1. The slab S that comes out is pulled out, and two pairs of upper and lower drive rolls 7A, 7B, 8A are provided in the frame 5 of the pinch roll unit 4 with a space along the slab guide passage 6.
8B is incorporated.

The cast strip withdrawing device 3 is provided with a long universal spindle 12A, 1 by a drive device 11 installed on the steel frame 9 or 10 above the pinch roll unit 4.
The pair of upper and lower drive rolls 7A and 7B and 8A and 8B are rotationally driven via 2B. Further, the drive device 11 is an electric motor.
13, a speed reducer 14, a miter gearbox 17A connected to the output shaft 15 of the speed reducer 14 via a universal spindle 16,
Each of the 17B is mounted on the steel frame, and the long side universal spindle 12A extending to the pinch roll unit 4 side below the output side gears (not shown) of the miter gearboxes 17A and 17B arranged side by side. , The upper end of 12B is connected.

A pair of upper and lower worm speed reducers 20A, 20B, 21A, 21B connected by a coupling 19 are attached to one outer side of the front and rear frame 18 of the pinch roll unit 4 via a bracket 22. . The worm reducers 20A to 21B are composed of worm gears (not shown) connected by couplings 19 and 19 and worm wheels meshing with the worm gears. The worm wheels of the lower worm reducers 20B and 21B to the lower drive rolls 7B and 8B.
Upper worm reducer 20A, 21A
The upper end of each worm gear is connected to the lower ends of the long universal spindles 12A and 12B. In the figure, reference numeral 23 is an elevating cylinder, which moves the upper (anti-reference side) drive rolls 7A, 8A up and down with respect to the lower (reference side) drive rolls 7B, 8B and pulls out the slab S. When the upper drive roll 7A, 8A
Is pressed against the slab S and pinched.

In the cast slab drawing apparatus 3 having the above structure, the electric motor 13 is used.
Reducer 14, universal spindle 16, miter gearbox 17A, 17B, long universal spindle 12
By rotating the vertical drive rolls 7A and 7B and 8A and 8B via A, 12B and the worm speed reducers 20A to 21B, the cast slab S between the vertical drive rolls is pulled out.

[0006]

In the above-mentioned cast strip withdrawing apparatus 3, two pairs of upper and lower drive rolls 7A and 7B, 8A and 8B are used.
Is rotatably driven by the drive device 11 installed on the steel frame 9 or 10 above the device via the long universal spindles 12A and 12B. Since it is not necessary to install the driving device 11 on the outside of the pinch roll unit 4 which is present, the width dimension of the entire equipment can be reduced, and the strand interval can be reduced in the case of continuous casting equipment having three or more strands. Despite the effects such as the above, since one motor 13 drives a plurality of drive rolls 7A, 7B, 8A, 8B in the pinch roll unit 4, each drive roll 7A, 7B, 8A, 8B becomes worn. If there is a difference in the roll diameter, the roll peripheral speed cannot be adjusted.

Further, usually, the electric motor is installed with a sufficient output corresponding to the number of drive rolls it receives, and when the drive roll and the slab slip, the output concentrates on the drive roll that does not slip. Therefore, even if such output concentration occurs, the drive system between the reduction gear and the drive roll is designed and provided with a strength that can withstand such output concentration. Therefore, the drive system is over-strength in the normal operation without slip. For example, in the case of the above-mentioned conventional technique, one motor 13 drives four drive rolls.
Since it has the strength to drive 7A, 7B, 8A, 8B, when slip occurs, in an extreme case, the output concentrates on one drive roll 7B and the slab S is pulled out. It is a drive system after the speed reducer 14 that can withstand this load.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the changed roll peripheral speed when the drive roll is worn and the roll diameter is changed to change the roll peripheral speed. (EN) Provided is an improved slab drawing apparatus in a continuous casting facility, which can be easily adjusted and can be lightened without giving a drive system between a reduction gear and a drive roll an unnecessarily high strength.

[0009]

In order to achieve the above-mentioned object, in a cast strip drawing apparatus in a continuous casting facility according to the present invention, each drive roll in a pinch roll unit is individually provided with a drive motor and a speed reducer. At the same time, the drive motor is arranged on the frame under the mold of the continuous casting facility with the output shaft facing the slab pass line.

In the slab drawing apparatus in the above continuous casting equipment, the driving electric motor may be of the flange mounting type.

Further, in the cast piece drawing apparatus in the continuous casting facility, the input shaft of the reduction gear may be a hollow shaft type.

[0012]

In the above structure, since the driving electric motor is vertically installed so that the output shaft thereof faces the slab pass line, a large number of electric motors can be arranged in a narrow installation space and the rolls can be individually driven. In addition, since each drive roll in the pinch roll unit is provided with a drive motor and speed reducer individually, the peripheral speed of each drive roll can be controlled individually for each drive motor. Can be easily adjusted even when the peripheral speed changes due to wear and difference in roll diameter. Further, since the electric motor may have a driving force suitable for one driving roll or one set of vertical driving rolls, its driving system does not need to have excessive strength more than necessary in consideration of abnormalities such as slip.

By adopting a flange mount type electric motor as the electric motor and / or a hollow shaft type speed reducer having an input shaft as the speed reducer, the electric motor and the speed reducer can be directly connected to each other and a coupling is unnecessary, and the electric motor can be mounted on the frame. It becomes easy to vertically install a so-called electric motor in which the output shaft is arranged toward the slab pass line.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a cast strip drawing apparatus in a continuous casting facility according to the present invention, and FIG. 2 is a sectional view taken along line XX of FIG. In the figure, the same parts as those in the prior art are designated by the same reference numerals.

The entire structure under the mold of the continuous casting equipment of this embodiment is basically the same as that shown in FIG. 3 shown in the above-mentioned prior art, and comprises a 4-strand curved continuous casting equipment. In the pinch roll unit 4 of the slab drawing device 3, two pairs of upper and lower drive rolls 7A, 7B, 7C are provided in the frame 5 of the roll unit at intervals along the slab guide passage 6. 7D is incorporated. Each of the vertical drive rolls 7A and 7B, 7C and 7D of each set is rotated by a drive unit 24 (24A, 24B) installed on the upper steel frame 10 via a long universal spindle 12 (12A, 12B). Driven.

A pair of upper and lower worm speed reducers 20A, 20B, 20C, 20D connected by a coupling 19 are provided on one outer side of the front and rear frame 18 of the pinch roll unit 4 as a bracket.
Mounted via 22. This worm reducer 20A
20D is composed of a worm gear (not shown) connected by couplings 19 and 19, and a worm wheel meshing with the worm gear.Each worm wheel of the upper worm reducer 20A, 20C is connected to the upper drive rolls 7A, 7C and the lower worm. Reducer 20B,
The worm wheels of 20D are connected to the lower drive rolls 7B and 7D, respectively, and the upper ends of the worm gears of the upper worm reducers 20A and 20C are connected to the long universal spindle.
It is connected to the lower ends of 12A and 12B.

The drive unit 24 is a flange mount type electric motor.
25 and the input hollow shaft type speed reducer 26 are directly connected to each other, and each output shaft (not shown) is vertically mounted on the steel frame structure 10 toward the slab guide passage 6, and the input hollow shaft The upper end of the long universal spindle 12 extending to the pinch roll unit 4 side below is connected to the output shaft of the die reducer 26.

Further, as shown in FIG. 2, the drive unit 24 is mounted above each of the four strands, ...
A pair of front and rear vertical frames 1 for each pinch roll unit 4
Drive devices 24, 24 are mounted on the steel frame structure 10 in the vicinity of above the strands so that the long universal spindle 12 hangs on the opposing frame sides of 8, 18. Further, on the outer strands on both sides, drive devices 24, 24 are mounted on the upper diagonal outer side of the strands, and a long universal spindle 12 is provided so as to reach a frame 18 on the outer side of the pinch roll unit 4. In this way, by ensuring the space above the strand even when the strands ~ are arranged closely,
When the pinch roll unit 4 is replaced, the pinch roll unit 4 can be pulled up.

The pinch roll unit 4 of this embodiment
Has a pair of upper and lower drive rolls 7A and 7B, 7C and 7D, but the operating principle and drive force transmission structure of each set of drive rolls as a pinch roll is basically different from the conventional one. I will omit the explanation because it does not exist.

In the slab drawing apparatus 3 having the above-mentioned structure, the vertical driving rolls 7A, 7B, 7C of each set in the pinch roll unit 4 are
Drive motors 25A and 25B and reducers 26A and 26B for 7D respectively
Since the upper and lower drive rolls are provided to drive, the peripheral speed of each set of the upper and lower drive rolls can be individually controlled for each drive motor 25A, 25B, and the drive roll is worn between the sets of the upper and lower drive rolls. Even if there is a difference in roll diameter and the peripheral speed changes, the adjustment can be easily performed. Further, since the electric motor 25 may have a driving force commensurate with one set of the vertical drive rolls 7A and 7B, the strength of the speed reducer 26, the long universal spindle 12 and the connecting mechanism thereof is comparable to that of a structure having a plurality of sets. It can be small and lightweight. Furthermore, the drive motor 25
Since A and 25B are placed vertically, more electric motors can be arranged than the conventional configuration shown in FIG.

Although the upper and lower rolls 7A and 7B, 7C and 7D in the pinch roll unit 4 are all drive rolls in the above embodiment, the present invention is not limited to this example. No, for example with the vertical drive roll 7A
7B, 7C and 7D coupling 19, upper worm reducer 20A,
20C may be removed and the upper drive rolls 7A and 7C may be free rolls. In that case, the drive device 24 composed of the flange-mounted electric motor 25 vertically mounted on the steel frame 10, the input hollow shaft type speed reducer 26, the long universal spindle 12 and the connecting mechanism between them is the lower drive roll. 7B, 7D
Since the upper roll is a free roll only by being connected to each of the above, the complexity of the structure is reduced compared to the above embodiment, and the peripheral speed due to roll wear can be easily adjusted between each set. The same effect can be obtained.

[0022]

As described above, in the case of the cast piece drawing apparatus in the continuous casting equipment according to the present invention, since the driving electric motor is vertically installed, it is possible to arrange a large number of electric motors in a narrow installation space. It becomes possible to drive. In addition, since each driving roll in the pinch roll unit is individually provided with a driving electric motor and a speed reducer, even if the driving roll is worn and a difference in roll diameter occurs and the roll peripheral speed changes,
By controlling the output of the driving electric motor, it can be easily adjusted according to the changed roll peripheral speed. In addition, it is not necessary to provide the drive system between the reduction gear and the drive roll with excessive strength, and the weight can be reduced.

Further, by adopting a flange mount type electric motor as an electric motor and / or a hollow shaft type speed reducer having an input shaft as a speed reducer, the electric motor and the speed reducer can be directly connected to each other and a coupling is not required, and the electric motor can be framed. It becomes easy to vertically install a so-called electric motor, whose output shaft is arranged on the slab path line.

[Brief description of drawings]

FIG. 1 is a front view of a slab drawing apparatus in a continuous casting facility according to the present invention.

FIG. 2 is a view on arrow XX in FIG.

FIG. 3 is an overall front view of a continuous casting facility including a conventional slab drawing apparatus.

FIG. 4 is a view on arrow Y of FIG.

FIG. 5 is an explanatory view of another slab withdrawal device in a conventional continuous casting facility.

[Explanation of symbols]

3: Slab extraction device 4: Pinch roll unit 5: Frame 6: Slab guide passage 7A, 7C: Upper drive roll 7B, 7D: Lower drive roll 10: Steel frame 12, 12A, 12B: Long universal spindle 18 : Front and rear frame 19: Coupling 20A, 20C: Upper worm reducer 20B, 20D: Lower worm reducer 22: Bracket 24: 24, 24,
24, 24: Drive device 25, 25A, 25B: Flange mount type motor 26, 26A, 26B: Input hollow shaft type reducer 27A, 27C: Free roll ,,,:
Strand

Claims (3)

[Claims] 1. A drive motor and a speed reducer are individually provided for each drive roll, and the drive motor is disposed on a frame under a mold of a continuous casting facility with its output shaft facing the slab pass line. A cast piece drawing apparatus in a continuous casting facility, which is characterized in that 2. A cast piece drawing apparatus in a continuous casting facility according to claim 1, wherein the driving electric motor is a flange mounting type. 3. The slab drawing apparatus in a continuous casting facility according to claim 1, wherein the input shaft of the speed reducer is a hollow shaft type.