JPH01188632A - Roll cooling equipment - Google Patents

Abstract

PURPOSE:To make roll exchange in a short period of time by disposing plural rolls of roll cooling equipment for cooling steel strips zigzag in the vertical direction and drawing the rolls out of apertures in the direction perpendicular to the roll shafts and loading the fresh rolls therein from the opposite side at the time of the roll exchange. CONSTITUTION:While the steel strip 30 past a gas jet cooling zone 101 of a continuous annealing device is carried to a 1st overaging treatment zone 102, the steel strip passes between the plural rolling rolls 20 disposed zigzag in the vertical direction and is cooled by the rolls 20. The apertures 40 for pulling the rolls and sealing devices 50 for opening or hermetically sealing the apertures 40 are provided on the side faces of shells 10 enclosing the cooling rolls. The exchange of these cooling rolls 20 with the fresh rolls is executed by opening the sealing devices 50, pulling the rolls 20 out of the apertures 40 in the direction perpendicular to the shafts thereof, and pushing the fresh rolls 20 from the apertures 40 on the opposite side of the shells 10, then hermetically closing the sealing devices 50. The shorter time required for the roll exchange is thus necessitated and the degradation of the operating efficiency of the annealing device by the roll exchange is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to roll cooling equipment having a structure that allows the cooling roll to be easily replaced.

[Conventional technology]

In order to cool the strip uniformly, the cooling roll for roll cooling equipment needs to have almost uniform surface thermal conductivity over the entire surface. Therefore, if the initial uniform cooling capacity cannot be maintained due to wear or the like on the roll surface, the roll must be replaced promptly.

[Problem that the invention seeks to solve]

■In conventional roll cooling equipment, the cooling rolls are often arranged horizontally, and the following problems occur when replacing the cooling rolls in such a roll arrangement. That is, when replacing the rolls, if the furnace cover is removed and all the cooling rolls are to be pulled out upwardly, the strip must be cut in the middle. Therefore, roll replacement is actually performed by pulling out the roll in the axial direction. However, since the diameter of the cooling roll is larger than the guide for the roll sliding device used to change the winding angle, the cooling roll must be replaced together with the roll sliding device, and it takes a lot of time (1 to 2 days) to replace it. )
is needed. At the same time, the replacement space becomes wider in the roll axis direction. Furthermore, since the roll spacing is small, structurally speaking, chocks and the like collide with the furnace shell, making it difficult to pull them out.

Furthermore, as far as maintaining the sealing performance within the roll cooling equipment is concerned, it is difficult to use such a roll clamping method using chocks.

(2) Also, due to installation space constraints, the cooling roll may be arranged vertically, but in that case as well, the roll is pulled out in the axial direction, resulting in the same problem as in (2) above.

The present invention was devised in view of the above-mentioned problems, and in order to efficiently replace the cooling rolls of the roll cooling equipment, the equipment has a structure that makes it easy to extract and insert the rolls.

[Means for solving problems]

Therefore, the present invention provides a roll cooling equipment having a structure as shown in FIG. In the figure, 3 is a strip, 2 is a cooling roll, and 1 is a furnace shell surrounding the cooling roll 2.

In the roll cooling equipment of the present invention, a plurality of cooling rolls 2 that are wound around a strip 3 to perform cooling are arranged in a vertical direction to form a vertical path, and a wall surface of a shell 1 surrounding these cooling rolls 2 is provided with openings 4 for pulling out the rolls. , a sealing device 5 capable of opening and sealing the opening 4 is provided, and each cooling roll 2 is pulled out in a direction perpendicular to the roll axis through the roll pulling opening 4, and conversely, replaced with a new cooling roll 2. The basic feature is that a roll changing device 6 that can push this in is provided.

[For production]

In the above-described roll cooling equipment, the strip 3 is cooled by each cooling roll 2 pressing against or wrapping the surface of the strip 3 while the strip 3 is flowing in the vertical direction. Because of this vertical path, rolls can be replaced with the plate in place. In this case, the sealing device 5 opens the roll pulling opening 4, the roll changing device 6 pulls out each cooling roll 2 through the opening 4 in a direction perpendicular to the roll axis, and conversely, the new cooling roll 2 that is waiting is transferred to the furnace. After this exchange is completed, the opening 4 for pulling out the roll is closed again by the sealing device 5.

〔Example〕

FIG. 2 shows an embodiment of the roll cooling equipment according to the present invention, in which the strip 30 that has passed through the gas jet cooling zone 101 of a continuous annealing furnace is rapidly cooled while it flows into the first overaging treatment zone 102. It shows. Incidentally, priddle rolls 110 for applying tension to the strip 30 in the equipment are provided on the inlet and outlet sides of the roll cooling equipment.

As shown in FIG. 2, the roll cooling equipment of this embodiment has a vertical path in which cooling rolls 20 #1 to #9 are arranged in a staggered manner in the vertical direction, and openings for pulling out the rolls are provided on the side surface of the shell 10 surrounding these cooling rolls 20. 40 and a sealing device 50 capable of opening and sealing the opening 40, and each cooling roll 20 is pulled out through the roll pulling opening 40, and conversely, replaced with a new cooling roll 20 and pushed in. A roll changing device 60 that can be replaced is provided.

The cooling rolls 20 #1 to #9 have their shaft ends extending outward from the furnace shell 10 and are rotatably supported on the outside thereof. One end of the roll is removably connected to a rotary section movement device, and the other end is provided with an inlet and an outlet of a water passageway for passing cooling water inside the roll, and these are connected to water supply and drainage equipment. It is connected. The rolls in this example are arranged in a staggered manner in the vertical direction as described above, but the distance between the rolls is kept as short as possible and the overall length is shortened to save space and cool the rolls. We are trying to equalize the speed.

The drawing opening 40 is provided in the wall surface of the furnace shell 10, and when the cooling roll 20 is replaced, the drawing opening 40 is provided in the wall surface of the furnace shell 10.
This serves as an entrance and exit for zero movement, and therefore the opening is large enough to allow the roll body of the cooling roll 20 to pass through.

In addition, in order to allow the staggered cooling rolls 20 #1 to #9 to be moved in and out of the furnace shell 10 with the strips 30 present, the openings 40 are formed on the sides of the non-contact surfaces of the strips 30 of each roll 20. They are provided in a staggered manner on the wall surface of the furnace shell lO in each direction.

The sealing device 50 includes a roll bang that can be fixed against the roll extraction opening 40 to close the opening 40, and a roll bang that can be removed from the opening 40 to seal the roll when the cooling roll 20 is replaced. It consists of a lifting and moving device that lifts the roll bang diagonally upward or diagonally downward so that it does not get in the way of movement.

The roll changing device 60 moves the cooling roll 20 in the direction perpendicular to the roll axis through the roll pulling opening 40, and as shown in FIG. a pedestal 61 that extends horizontally to the pedestal 61; a moving device that pushes out or pulls in the cooling roll 20 on each pedestal 61;
It consists of an overhead crane that moves the cooling roll 20 that has moved upward to the side and suspends it downward from there.

Next, a method of using the roll cooling equipment of this embodiment will be explained.

First, when performing normal roll cooling, each bearing bracket is moved to the side of the furnace shell 10 by each roll changing device 60, and by adjusting the amount of movement, each cooling roll 20#1 to #9 is moved. wrapping around the strip 30 adjusts the corners. At this time, each roll extraction opening 40 is sealed by a roll bang of a sealing device 50 to prevent the furnace atmosphere from leaking to the outside of the furnace shell 10. In this state, each cooling roll 20#1 to #9 is rotated by circulating cooling water in the passageway of each cooling roll 20#1 to #9 and driving a rotary drive device connected to the roll shaft. When rotated, it can contact the strip 30 coming out of the 1 inch gas jet cooling zone and rapidly cool it.
The drained water can be directly sent to the overaging treatment zone 102.

During the above-described rapid cooling process, various sensors measure the temperature in the direction from the spacer 1 to the rear plate 30 to constantly sense whether or not uniform cooling is being achieved. When the uneven temperature distribution in the width direction becomes noticeable, the strip 30 in the roll cooling equipment
After stopping the running of the furnace and purging the atmosphere inside the furnace, the cooling rolls 20 #1 to #
Exchange the necessary rolls among the 9. In this case, a new cooling roll 20 is placed on the end of the stand 61 of the cooling roll 20 that needs to be replaced. and the sealing device 50
The roll bang is lifted (or lowered) diagonally upward (or diagonally downward) by the lifting and moving device, and the opening 40 for pulling out the roll is opened.

Next, the cooling roll 20 is moved to the stand 6 by the roll changing device 60.
1. Perform the work of pulling it out upwards. After that, using a special room jig, it is lifted out by the above-mentioned ceiling crane and lowered downward. Next, the cooling roll 20 that has been waiting at the end of the pedestal 61 is moved to a predetermined position within the furnace shell 10 through the roll extraction opening 40. Then, the roll bang of the sealing device W50 is placed against the roll pull-out opening 40 by a lifting device and fixed, and the roll pull-out opening 40 is sealed. Further, the cooling roll 20 is appropriately moved by the moving device to adjust the winding angle of the strip 30 on the cooling roll 20. Thereafter, one end of the roll shaft of the cooling roll 20 is connected to a rotary drive device, and the other end is connected to water supply and drainage equipment. When the furnace is finally purged, the roll replacement work described above is completed and the roll cooling equipment is ready to operate again.

〔Effect of the invention〕

As described above, according to the roll cooling equipment of the present invention, the cooling roll can be easily and quickly replaced even when there are plates, improving the equipment operation rate, and reducing the space and equipment required for roll replacement. It has the excellent effect of requiring only a small installation space. It should be noted that the present invention is applicable not only to continuous annealing but also to a cooling device for surface treatment, chemical vapor deposition/physical vapor deposition, diffusion treatment, etc.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the basic configuration of the present invention, and FIG. 2 is a schematic diagram showing a roll cooling facility according to an embodiment of the present invention. In the figure, ■, 10 is the furnace shell, 2, 20 are cooling rolls, 3, 3
0 is the strip, 4, 40 is the opening for pulling out the roll, 5, 5
0 is a sealing device, 6 and 60 are roll replacement devices, 101 is a gas jet cooling zone, and 102 is a first overaging treatment zone.

Claims (1)

[Claims] A plurality of cooling rolls that are wound around the strip to perform cooling are arranged in the vertical direction to form a vertical path, and a shell wall surface surrounding these cooling rolls is provided with an opening for pulling out the rolls and a sealing device that can open and seal the opening. In addition, a roll changing device is provided which can pull out each cooling roll in a direction perpendicular to the roll axis through the roll pulling opening, replace it with a new cooling roll, and push it in. Facility.