JP2867627B2 - Roll cooling device for rolling mill - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roll cooling device for a rolling mill.

[Prior Art] Conventionally, as a roll cooling device for a rolling mill, a spray type device that directly injects a cooling liquid onto a roll has been used.

However, in the case of a spray-type roll cooling device, the sprayed cooling liquid reflects on the roll surface, or the sprayed cooling liquid interferes with the sprayed cooling liquid and the cooling liquid reflected on the roll surface. , The cooling capacity was low.

However, in recent years, a roll cooling device having a high cooling capacity has been demanded in response to a tendency that a thermal load applied to a roll tends to increase due to continuation of a continuous casting facility and a rolling facility. Have been.

Therefore, for example, as described in Japanese Utility Model Application Laid-Open No. 59-162106, a roll cooling device has been proposed in which a cooling liquid is caused to flow in a laminar flow on the surface of a roll to increase the cooling capacity. .

Hereinafter, a roll cooling device of a conventional rolling mill will be described with reference to FIG.

In the figure, 1 is a work roll of a rolling mill, 2 is a backup roll, and 3 is a rolled material.

A frame 4 is provided in the housing of a rolling mill (not shown) in close proximity to the work roll 1, and brackets 5 are provided on the work roll 1 side of the frame 4 and at positions near both ends of the work roll 1.

A central portion of a U-shaped arm 7 is pivotally connected between the brackets 5 via a support shaft 6 parallel to the work roll 1, and a counterweight 8 is attached to an upper end of the arm 7.
Is fixed.

On the other hand, a guide plate 9 having a curvature substantially equal to that of the work roll 1 so as to face the work roll 1 with a small space S therebetween.
And a supply side header 11 having a slit 10 parallel to the work roll 1 toward the work roll 1 is attached to the guide plate 9.
And a collecting side header having a slit 12 facing the work roll 1 and parallel to the work roll 1.
13 is provided on the upper portion of the guide plate 9, and further surrounds the guide plate 9, the supply-side header portion 11, and the recovery-side header portion 13 and contacts the surface of the work roll 1 to form a liquid-tight space therebetween. The cooling header 15 is formed by providing the seal member 14.

At the lower end of the arm 7, via a fulcrum pin 16 parallel to the work roll 1, the anti-work roll 1
The holding piece 17 attached to the side is rotatably pivotally mounted.

Reference numeral 18 denotes a draining plate having a rear end fixed to the frame 4 and having a front end in contact with a portion of the work roll 1 below a position where the cooling header 15 contacts.

Then, the tip of the arm 7 is urged by the counter wire 8 to rotate upward with the support shaft 6 as a fulcrum,
A cooling header 15 rotatably connected to the tip of the arm 7 via a fulcrum pin 16 is pressed against the surface of the work roll 1.

In this state, the coolant is supplied to the gap S between the work roll 1 and the guide plate 9 from the slit 10 of the supply header 11 and the coolant is flown in a layered manner at the gap S, and then the coolant is collected from the slit 12. The work roll 1 is cooled by being collected in the side header portion 13.

[Problems to be Solved by the Invention] However, the conventional roll cooling device for a rolling mill has the following problems.

That is, the position of the work roll 1, particularly the upper work roll 1, fluctuates up and down due to disturbances such as plate thickness fluctuations during rolling, for example, but the cooling header 15 is mounted on the frame 4 fixed to the housing of the rolling mill. The work roll 1 is merely attached so as to be able to approach and separate from the work roll 1 via the base 7. Could not be followed.

Therefore, it was difficult to actually use the work roll 1 for cooling during rolling.

In view of the above circumstances, the present invention can support the cooling header so that it can follow up and down fluctuations of the work roll, and automatically maintain a small gap between the cooling header and the work roll. It is an object of the present invention to provide a roll cooling device for a rolling mill.

Means for Solving the Problems The present invention provides an elevating frame that can be raised and lowered integrally with a work roll, and attaches a roll cooling device main body having a cooling pad having a curvature substantially equal to the work roll to the work roll side to the elevating frame. While supporting the work roll so that it can approach and separate from the work roll, between the roll cooling device main body and the elevating frame, an interval adjusting device for moving the roll cooling device main body toward and away from the work roll is provided. In order to automatically maintain a small gap between the cooling pad and the work roll, a distance detector that detects the gap between the cooling pad and the work roll and controls the gap adjusting device is provided. It concerns a roll cooling device of a rolling mill.

[Operation] According to the present invention, by supplying cooling water between the cooling pad of the roll cooling device main body and the work roll surface, the cooling water flows in a layered manner on the work roll surface, and the work roll is efficiently formed. Cooled.

The distance detector detects the distance between the cooling pad and the work roll, and controls the distance adjustment device based on the detection signal from the distance detector so that the small distance between the cooling pad and the work roll is automatically maintained. Therefore, a high cooling capacity can be maintained at all times, and the roll cooling device main body is moved toward and away from the work roll by the interval adjusting device, so that it can be adapted to work rolls having different diameters.

Since the roll cooling device main body is supported by an elevating frame that can be moved up and down integrally with the work roll, the roll cooling device main body also moves up and down following vertical movement of the work roll.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

 1 to 6 show one embodiment of the present invention.

In the figure, 19 is the housing of the rolling mill, 20 is the work roll of the rolling mill, 21 is the backup roll, 22 is the axle box of the work roll 20, 23 is the axle box of the backup roll 21, 24 is the housing 19 and the upper backup roll 21 A hydraulic pressure reduction cylinder provided between the shaft box 23 of the housing 19, a balance beam 25 for urging the shaft box 23 of the upper backup roll 21 upward by a counter balance cylinder (not shown) provided in the housing 19, and a housing 26. Shaft box 22 of 19 and work roll 20
Shift guide part provided between 27 and 27 is a work roll
A bending device provided between the axle box 22 of 20 and the shift guide section 26, 28 is a feeding direction of the rolled material, 29 is a pass line of the rolled material, 30 is a rail for replacing work rolls, and 31 is an output of the rolling mill. It is a looper provided on the side.

As shown in FIG. 4, the rolled material feed direction of the housing 19
On the exit side and above the pass line 29, a pair of left and right detachable guide bodies 33 having a guide portion 32 that moves upward as going toward the exit side in the feed direction 28 is provided, and between the detachable guide bodies 33,
As shown in FIG. 2, a detachable frame 35 extending parallel to the work roll 20 is fitted and supported so that guide portions 34 formed at both ends of the detachable frame 35 can be detachably attached to the guide portion 32.

A vertical link 37 as shown in FIG. 1 is pivotally connected to the upper part of the housing 19 above the detachable guide body 33 via a horizontal shaft 36 so as to be rotatable up and down. The unit and the attachment / detachment frame 35 are connected via a small link 38, and an attachment / detachment cylinder 39 extending vertically between the upper end of the dogleg link 37 and the housing 19 is interposed.

Further, the upper and lower passing plate guides are provided below the detachable frame 35.
40, 41 are attached together.

Similarly, as shown in FIG. 4, a pair of left and right detachable guide members 43 having a guide portion 42 extending in the feed direction 28 at a position on the rolled material feed direction 28 exit side of the housing 19 and below the pass line 29. As shown in FIG. 3, a detachable frame 45 extending parallel to the work roll 20 is provided between the detachable guide bodies 43 at guide portions 44 formed at both ends of the detachable frame 45.
Are fitted to and supported by the guide portion 42 so as to be detachable.

Then, a detachable cylinder 46 extending in the feed direction 28 is interposed between the detachable guide body 43 and the detachable frame 45.

As shown in FIG. 2, FIG. 3, and FIG. 5, the upper and lower removable frames 35 and 45 are provided at both ends on the work roll 20 side, respectively.
Guide sections 51, which are formed at upper and lower guide sections 47, 48 extending vertically, and have lift frames 49, 50 extending parallel to the work roll 20 at both ends of the lift frames 49, 50 between the lift guide sections 47, 48. , 52 are fitted to and supported by the lift guides 47, 48 so as to be able to move up and down.

Then, the upper lifting frame 49 and the balance beam
25, and between the lower elevating frame 50 and the downwardly extending arm 53 provided on the lower attaching / detaching frame 45, via locking state releasing cylinders 54, 55 extending vertically. Dress.

On the other hand, as shown in FIGS. 2, 3, and 6, support members 56, 57, and 58, 59 extending toward the work roll 20 are provided at both ends and intermediate portions of the upper and lower elevating frames 49, 50, respectively. The support members 56, 57 and 58, 59 protrude, and the locking cylinders 60, 61 and the locking pins 62, 63 parallel to the work roll 20 are provided.
The telescopic locking devices 64 and 65 formed by integrating the work roll 20 are supported so as to be movable in the axial direction of the work roll 20, and
Locking members 66, 67 such as hooks for locking both ends of the locking devices 64, 65 from below and releasing from above or from the sides are provided on the portions of the shaft box 22 of the strain crawl 20 on the lifting frame 49, 50 side. Provide.

Alignment guides 68, 69 extending in the feed direction 28 are provided below the support members 56, 58 at both ends of the upper and lower elevating frames 49, 50. Rolls extending parallel to the work roll 20 are provided between the interval adjustment guides 68, 69. The cooling device main bodies 70, 71 are provided with a gap adjusting guide portion 7 formed at both ends of the roll cooling device main bodies 70, 71.
2, 73 is the feeding direction 28 with respect to the interval adjusting guides 68, 69.
The fitting is supported so that it can move freely.

Then, space adjusting devices 74, 75 such as worm jacks are attached to the lower portions of the lifting frames 49, 50, and the space adjusting devices 74,
The distal ends of drive shafts 76 and 77 such as worm screws extending to the work roll 20 side of 75 are connected to roll cooling device main bodies 70 and 71 via rotary joints 78 and 79.

The roll cooling device main bodies 70 and 71 are provided with a cooling liquid chamber 8.
0, 81, and is substantially equal to the work roll 20 in which one surface is fixed to the coolant chambers 80, 81 and the other surface is formed with narrow cylindrical cooling spaces 82, 83 along the surface of the work roll 20. A slit-shaped coolant supply path parallel to the work roll 20 that has cylindrical surfaces 84 and 85 with slightly larger curvature and communicates between the coolant chambers 80 and 81 and the cylindrical surfaces 84 and 85.
Cooling pads 88 and 89 having formed therein 86 and 87, and cooling liquid supply pipes 90 and 91 for supplying a cooling liquid to the cooling liquid chambers 80 and 81, respectively.

Cooling pad 88,89, cooling pad 88,89 and work roll
Distance detectors 92 and 93 for detecting the interval formed between
Is mounted so that the distance adjusting devices 74 and 75 can be controlled by the detection signals from the distance detectors 92 and 93 so that the space between the cooling pads 88 and 89 and the work roll 20 can be kept at a small distance.

 Next, the operation will be described.

When the coolant is supplied from the coolant supply pipes 90 and 91 to the coolant chambers 80 and 81, the coolant flows from the coolant chambers 80 and 81 through coolant supply passages 86 and 87 formed in the cooling pads 88 and 89. The work roll 20 is sent out to narrow cylindrical cooling spaces 82 and 83 formed between the cooling pads 88 and 89 and the work roll 20, and flows in a laminar flow form on the surface of the work roll 20 to cool the work roll 20. In this way, work rolls with laminar cooling liquid
By cooling 20, a high cooling capacity for work roll 20 can be obtained.

When a disturbance such as a change in the thickness of the rolled material occurs during rolling, the upper work roll 20 moves up and down.In the present invention, the upper lifting frame 49 is attached and detached via the guide portion 51 and the lifting guide portion 47. Since it was fitted and supported to the frame 35 so as to be able to move up and down freely, the pressure was released from the pressure chamber of the locking state releasing cylinder 54 provided between the elevating frame 49 and the detachable frame 35, thereby engaging with the locking device 64. The upper elevating frame 49 locked to the axle box 22 of the work roll 20 via the stop member 66 moves up and down following the up and down movement of the upper work roll 20, and thus the upper side frame supported by the elevating frame 49. The roll cooling device main body 70 moves up and down following the up and down movement of the upper work roll 20.
In this way, by moving the upper roll cooling device main body 70 up and down following the up and down movement of the upper work roll 20, the work roll 20 can be cooled without any trouble during rolling.

At this time, distance detectors 92, 93 are attached to the cooling pads 88, 89, and the distance between the cooling pads 88, 89 and the work roll 20 is detected, and the distance adjusting device is detected by a detection signal from the distance detectors 92, 93. 74, 75 is controlled so that the space between the cooling pads 88, 89 and the work roll 20 is kept at a small interval, so that a high cooling capacity can be always maintained, and It is possible to automatically cope with a case in which is replaced with a different diameter.

When the work roll 20 is shifted in the axial direction,
The locking devices 64, 65 on the lifting frame 49, 50 side are supporting members 5
6, 57, 58, 59 so that the work roll 20 is shifted in the axial direction, the locking state of the locking devices 64, 65 and the locking members 66, 67 even if the work roll 20 is shifted in the axial direction. The locking devices 64, 65 and the support members 56, 57, 58, 59 move relative to each other in the axial direction while the roll cooling device bodies 70, 71 are kept at their original positions.

When the roll cooling device is removed from the rolling mill, the lifting frames 49, 50 are lifted by the upper and lower locking state releasing cylinders 54, 55 to release the wedge engagement between the locking members 66, 67 and the locking devices 64, 65. By extending the upper attachment / detachment cylinder 39, the V-shaped link 37 is rotated counterclockwise in FIG. 1 by a required angle, and the small link 38, the guide portions 34, 32, and the attachment / detachment guide body 33 are rotated. The lifting frame 49 together with the detachable frame 35 is pulled out of the housing 19 to the upper right, and the lower attaching / detaching cylinder 39 is simultaneously contracted and moved, so that the guide portions 44, 42,
The elevating frame 50 together with the detachable frame 45 is pulled out from the housing 19 to the right through the detachable guide body 43. At this time, the upper detachable frame 35 is pulled out from the housing 19 obliquely to the upper right, so that the upper detachable frame 35 can be removed from the rolling mill without interfering with the looper 31. When the roll cooling device is mounted on the rolling mill, the procedure opposite to the above is performed.

FIG. 7 shows another embodiment of the present invention, in which a work roll is provided.
Except that 20 is applied to a rolling mill that does not shift in the axial direction, it has the same configuration as that of the above-described embodiment, and the same operation and effect can be obtained.

It should be noted that the present invention is not limited only to the above-described embodiment, and it is needless to say that various changes can be made without departing from the scope of the present invention.

[Effects of the Invention] As described above, according to the roll cooling device of the rolling mill of the present invention, since the roll cooling device main body is supported by the elevating frame that can be moved up and down integrally with the work roll, the vertical movement of the work roll is changed. The distance between the cooling pad and the work roll can be controlled by controlling the distance adjusting device by detecting the distance between the cooling pad and the work roll. Are automatically maintained at a small interval, and as a result, various excellent effects can be exerted such as always maintaining a high cooling capacity.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of the present invention, and FIG.
FIG. 3 is a view taken in the direction of arrows II-II, FIG. 3 is a view taken in the direction of arrows III-III in FIG.
Figures are views taken along arrows IV-IV in FIGS. 2 and 3, FIG. 5 is a view taken along arrows VV in FIG. 1, FIG. 6 is a view taken along arrows VI-VI in FIG. Is a view similar to FIG. 2 of another embodiment of the present invention, and FIG. 8 is a side view of a conventional example. In the figure, 20 is a work roll, 49 and 50 are elevating frames, 70 and 71 are roll cooling device main bodies, 74 and 75 are interval adjusting devices, 88 and 89 are cooling pads, and 92 and 93 are distance detectors.

Claims (1)

(57) [Claims] An elevating frame which can be moved up and down integrally with a work roll is provided, and a roll cooling device main body having a cooling pad having a curvature substantially equal to that of the work roll is provided on the work roll side so as to be able to approach and separate from the work roll. Along with the support, between the roll cooling device main body and the elevating frame, an interval adjusting device for moving the roll cooling device main body toward and away from the work roll is provided, and the interval adjusting device allows the space between the cooling pad and the work roll to be moved. A roll cooling device for a rolling mill, comprising a distance detector for detecting a distance between a cooling pad and a work roll and controlling a distance adjusting device so as to automatically maintain a small distance.