JPH05263149A - Sealing equipment in continuous heat treatment equipment for metal strips - Google Patents

Abstract

(57) [Summary] [Object] To provide a sealing device capable of easily adjusting a gap between a sealing roll and a sealing plate by an operation from outside the furnace in a continuous heat treatment facility for metal strips even during operation. In a sealing device comprising a pair of seal rolls and a pair of seal plates provided substantially above and below each roll constituting the seal rolls, the seal rolls are placed outside the furnace. The elevating mechanism provided was capable of elevating and lowering the seal roll by operating the elevating mechanism outside the furnace so that the gap between the seal plate and the seal plate could be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous annealing process for metal strips such as continuous annealing equipment for steel strips,

[0002] The present invention relates to a seal roll type sealing device provided for sealing the above.

2. Description of the Related Art In a continuous annealing equipment for steel strips, a seal roll 1'comprising a pair of rolls 3'as shown in FIG. A seal device including a seal plate 2'disposed between and is used. Normally, in this sealing device, the gap between the pair of rolls 3'constituting the seal roll 1'is adjusted by a gap adjusting screw, and in an emergency such as when the steel strip drawing portion is passed, the roll 3'via an arm. The structure is such that the rolls can be forcibly opened by a connected air cylinder (not shown), and these can be operated outside the furnace even during operation.

[0003]

However, the seal plate 2'is fixed to the furnace shell b with a bolt in order to maintain airtightness with the furnace shell b, and the gap between the seal plate 2'and the seal roll 1'is fixed. Has a drawback that it can be adjusted only for a limited time such as when the furnace is stopped. Also, the seal plate 2
It is necessary to set the gap between the seal roll 1'and the seal roll 1'in consideration of the thermal expansion of the furnace shell b and the seal roll 1 ', but since the above gap adjustment is performed in the cold state, it must be estimated based on calculation. As a result, it may not be possible to form a set gap during operation as a result. In view of the above problems, it is an object of the present invention to provide a sealing device capable of easily adjusting the gap between the sealing roll and the sealing plate by an operation from outside the furnace even during operation.

[0004]

[Means for Solving the Problems] There are two methods for adjusting the gap between the seal roll and the seal plate: a method of moving the seal plate and a method of moving the seal roll. Fixing is considered to be the best method for maintaining airtightness, and therefore the method of moving the seal roll is adopted in the present invention. That is, the present invention relates to a sealing device comprising a pair of seal rolls, and a pair of seal plates provided above or below each of the rolls constituting the seal rolls and substantially parallel to each other. It is characterized in that it can be raised and lowered by a raising and lowering mechanism provided outside.

[0005]

In the seal device of the present invention, the seal roll is moved up and down by operating the elevating mechanism outside the furnace, and the gap between the seal roll and the seal plate is adjusted.

[0006]

1 to 3 show an embodiment in which the sealing device of the present invention is provided on the cooling zone entrance side of a steel sheet continuous annealing facility. In the figure, 1 is a seal roll composed of a pair of rolls, and 2 is a seal plate provided above the rolls 3 constituting the seal roll substantially in parallel with each other. The seal roll 1 has a structure in which a pair of rolls 3 is opened and closed in the left-right direction by an air cylinder, and the bearing box of each roll 3 is held by a rotatable arm provided outside the furnace. Is rotated by the air cylinder. In this embodiment, the seal roll is raised and lowered by raising and lowering the arm itself.

A pair of rolls 3 constituting the seal roll 1.
Each of the roll shafts 3a passes through the furnace shell a and is guided to the outside of the furnace, and a pedestal 8 is provided above the roll shafts 3a. A gate-shaped lifting bracket 9 for holding an arm for opening and closing the roll is provided on the pedestal 8 so as to be lifted and lowered. The gate-shaped lifting bracket 9 has guide plates 28 provided on both sides of the gantry 8 on the inner sides of both vertical frames thereof.
Abutting against the pedestal 8 while being guided by the both guide plates 28.
Move up and down against.

Further, a female screw member 12 is provided through the central portion of the horizontal frame of the lifting bracket 9. A screw shaft 10 having a threaded portion 100 at a lower end is rotatably provided on an upper portion of the gantry 8 via a holding block 27. An operation handle 11 is attached to the upper end of the screw shaft 10. The screw portion 100 of the screw shaft 10 is screwed into the female screw member 12 of the elevating bracket 9 and is rotated to rotate the screw shaft 10.
The lifting bracket 9 is configured to move up and down with respect to the pedestal 8.

An arm holding shaft 6 is rotatably provided below the lifting bracket 9 via a bearing 22, and an arm 5 for holding a roll bearing box is mounted on the arm holding shaft 6 via a sleeve 14. It is fixed. The arm 5 has a substantially inverted L-shape, and is fixed to the arm holding shaft 6 through a substantially middle portion of the inverted L-shape, and is rotatable about the arm holding shaft 6 as a fulcrum. The bearing box 4 is pierced and fixed to the part 51 on one side of the arm 5 through a fixing plate 15, and the roll shaft 3a is rotatably mounted on the bearing box 4.

On the other hand, the air cylinder 7 is mounted on the base 21, and the tip of the operating rod is connected to the portion 52 on the other side of the arm 5. A connecting plate 23 having an elongated hole 24 is fixed to the tip of the operating rod of the air cylinder 7, and a shaft 25 attached to the arm 5 side.
Is located in the elongated hole 24 of the connecting plate 23, and the actuating rod and the arm 5 are connected via the connecting plate 23 with the elongated hole and the shaft body 25.
And are connected. With such a connecting structure, the arm 5 can be moved up and down as the lift bracket 9 is moved up and down. A short cylinder 16 surrounding the roll shaft 3a is fixed to a side surface of the arm 5 opposite to the bearing box mounting side, and a bellows 17 for sealing is provided between the short cylinder 16 and the furnace shell a side.
Is installed.

In the other drawings, 19 is a gap adjusting means for holding the arms 5 at a predetermined position and adjusting the gap between the rolls 3, and 20 is each arm 5 with the pair of rolls 3 being opened. It is a fixed plate that is attached when holding the fixed plate 20. The fixed plate 20 is a protruding plate 2 provided on the arm 5.
6 is connected. Further, 13 is a counterweight attached to the end of the portion 52 of the arm 5, and 18 is a blowing pipe for supplying N ₂ gas for sealing to the seal plate 2.

In the above embodiment, the operating handle 11
When the screw shafts 10 respectively corresponding to the roll shafts 3a of the pair of rolls 3 are rotated by the
Moves up and down, whereby the arm holding shaft 6 and the arm 5 held by the lifting bracket 9 and the bearing box 4 held by the arm 5 move up and down, and the roll 3 can be moved up and down. Further, the arm 5 is rotated by the air cylinder 7 with the arm holding shaft 6 as a fulcrum, and the roll 3 constituting the seal roll 1 can be opened / closed regardless of the elevation of the seal roll 1 as described above.

In this embodiment, the screw shaft 10 is rotated by turning the operation handle 11, but it is also possible to adopt a structure in which the screw shaft 10 is rotated by an appropriate driving device. is there. Also,
In the above embodiment, the arm 5 holding the bearing box 4 and its fulcrum itself are moved up and down. However, for example, only the bearing box 4 is moved up or down, or the entire roll support mechanism including the air cylinder 7 and the like. It is also possible to have a structure for moving up and down. In the latter case, the base 21 is supported by an appropriate lifting mechanism.

FIG. 4 schematically shows an example of a structure in which only the bearing box 4 is moved up and down. A slide guide 29 for guiding the bearing box 4 is provided on a portion 51 of the arm 5, and this slide guide 29 is provided. A bearing box 4 is vertically slidable. On the other hand, the female screw member 31 is attached to the arm 5.
The screw shaft 30 is rotatably attached to the female screw member 31 via the screw portion 300, and the lower end of the screw shaft 30 is rotatably connected to the upper portion of the bearing box 4.

According to such a structure, the female screw member 31
When the screw shaft 30 held by the screw shaft 30 is rotated, the screw shaft 30 moves up and down with respect to the arm 5, and the bearing box 4 held at the lower end of the screw shaft 30 also slides.
Along which the seal roll is raised and lowered.

[0016]

According to the above-described sealing device of the present invention, the seal roll can be freely moved up and down by an operation outside the furnace, and the clearance between the seal roll and the seal plate can be easily adjusted even during operation. You can

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing an embodiment of a sealing device of the present invention.

FIG. 2 is a vertical cross-sectional view partially showing one roll shaft support portion of the apparatus shown in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an explanatory view showing another embodiment of the sealing device of the present invention.

FIG. 5 is a side view showing the outline of a sealing device in a steel sheet continuous annealing facility.

[Simple explanation of symbols]

1 ... Seal roll, 2 ... Seal plate, 3 ... Roll,
3a ... Roll shaft, 4 ... Bearing box, 5 ... Arm, 6 ... Arm holding shaft, 7 ... Air cylinder, 8 ... Stand, 9 ... Lifting bracket, 10 ... Screw shaft, 11 ... Operation handle, 12
... Female screw member, 21 ... Base, 29 ... Slide guide, 3
0 ... screw shaft, 31 ... female screw member, 100, 300
… Screw part, a… Furnace shell

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Yamazaki 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (1)

[Claims] 1. A seal roll comprising a pair of rolls,
In a sealing device including a pair of seal plates provided above or below each roll constituting the seal roll and substantially parallel to each other, the seal roll is configured to be movable up and down by an elevating mechanism provided outside the furnace. Device for continuous heat treatment of metal strips