JPH09155416A - Roll cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll cooling device with which work load necessary to cool a roll is reduced, also uniform cooling is executed in a shorter time and the whole constitution is more simplified. SOLUTION: A pallet 16 in which a roll 9 is housed after changing a rolling mill is formed into a cistern shape in which water is storable till the roll 9 becomes in a dipped state, this pallet 16 is transported to the stockyard Pt for pallets for water cooling with a pallet transporting truck 33 and water cooling is executed with the roll housed in this pallet 16. In this way, the transfer of the roll is unnecessitated, so the work load is reduced. And, by cooling the roll in the state in which the roll is dipped into cooling water, the uniformity of cooling is improved and cooling time is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll cooling device which is used when cooling a combination roll in a rolling mill before regrinding.

[0002]

2. Description of the Related Art The surface quality of a roll incorporated in a rolling mill gradually deteriorates with the lapse of its actual operating time. Therefore, the roll is properly removed from the rolling mill and the surface is reground or shot blasted or plated. After the regeneration process,
It is used by being incorporated into the rolling mill again.

By the way, when the roll is removed from the rolling mill, the temperature is high, and in this state the precision during regrinding cannot be ensured. Therefore, the roll is cooled to near room temperature before regrinding. Conventionally, such roll cooling is performed using a water-cooling roll stand 52 capable of accommodating a plurality of rolls 51 in multiple stages (for example, two stages) as shown in FIG. In this water cooling roll stand 52, a water pipe 54 equipped with nozzles 53 for spraying cooling water in a shower shape on the surface of each storage roll 51.
Is provided.

The roll removed from the rolling mill is, for example, a transfer roll stand (not shown) mounted on a carrier truck.
After being sequentially housed in the inside, they are conveyed by a carrier truck to the vicinity of the installation location of the water cooling roll stand 52 described above. After that, they are transferred one by one from the inside of the transport roll stand to the inside of the water roll stand 52 by an overhead crane, lifting equipment, wires, etc., and cooled by the shower water in this water roll stand 52. After the cooling is completed, it is again transported to the grinding equipment by a crane, or once transported to the temporary storage location and temporarily placed on the temporary roll stand, and then sequentially transported to the grinding equipment and re-processed. A grinding process is performed.

[0005]

However, in the above-mentioned conventional structure for cooling the rolls with water, first, the rolls are stored in the transport roll mounts and transported to the water cooling place by the transport carriage, and then from the transport roll mounts. Water cooling roll stand 52
It is necessary to transfer the rolls inside one by one using an overhead crane. For this reason, there is a problem that the work load in performing the roll cooling increases.

Further, in the cooling by the shower system, it is difficult to make the amount of water flowing on the roll surface uniform over the entire length in the longitudinal direction of the roll, so that the cooling temperature distribution tends to become non-uniform. As a result, a waiting time is required until the heat distribution of the rolls settles down so that grinding can be performed with a grinder, which also causes a problem of lowering work efficiency.

The present invention has been made in view of the above-mentioned conventional problems, and can reduce the work load required for cooling a roll and can perform uniform cooling in a shorter time. Further, it is an object of the present invention to provide a roll cooling device which can further simplify the entire structure.

[0008]

In order to achieve the above object, a roll cooling device according to claim 1 of the present invention is a pallet for accommodating therein rolls recombined by a rolling mill, and a pallet for water cooling. A pallet carrier for transporting the pallet to the pallet yard is provided, and the pallet is formed in a water tank shape capable of storing water until the roll housed inside is in a submerged state. It is characterized in that a water supply means for supplying cooling water into the pallet placed on the pallet mounting table provided in and a water discharge means for discharging the water in the pallet are provided.

According to such a construction, after the recombining rolls in the rolling mill are accommodated in the pallet and conveyed to the water cooling pallet yard, the roll is kept in the pallet and is cooled in the pallet. By supplying water, the roll is cooled with water. Therefore, since it is not necessary to transfer the roll, the work load in cooling the roll is reduced.

Further, the rolls are cooled in the pallet while being immersed in the cooling water, and in this case, a substantially uniform heat exchange state over the entire length of the rolls is generated between the rolls and the cooling water. be able to. As a result, the non-uniform cooling in the longitudinal direction of the roll, which occurs in the conventional shower system, is avoided and the uniformity is improved. As a result, the roll cooling time can be shortened.

According to another aspect of the roll cooling device of the present invention, the pallet table of the water cooling pallet table is provided with a trolley entry space into which the pallet carrier truck can enter, and the pallet carrier truck lowers the conveyed pallet. It is characterized in that pallet transfer means for transferring the pallet on the pallet table is provided so as to extend over the trolley entry space.

In this case, the transfer of the pallet from the pallet carrier to the pallet table in the water cooling pallet yard also occurs due to the pallet lowering operation by the pallet transfer means provided in the pallet carrier, so this pallet transfer is performed. It is not necessary to use a crane for loading, so
Further, the work load can be reduced. According to a third aspect of the present invention, in the roll cooling device according to the third aspect, the pallet is internally provided with a roll supporting portion that supports the rolls from below in a stacked state in which a plurality of rolls are arranged parallel to each other and horizontally. It has a feature.

As described above, in the case of a structure in which a plurality of rolls are loaded in a single stage, the rolls can be stored in the pallet on the rolling mill, and the rolls can be taken out after cooling by using a crane and a hanger. Even when it is carried out, since the storage height position is substantially constant, the operation of raising and lowering each roll becomes easy and it becomes easy to automate it, which also reduces the work load.

According to a fourth aspect of the roll cooling device of the present invention, the pallet is provided with an overflow drainage port at a predetermined water level where the inner roll is immersed, while the water supply means stores the stored water in the pallet at the predetermined level. After the water level is reached, a water amount control means for controlling the amount of supplied water to control the cooling water to be supplied for a predetermined time is additionally provided.

That is, at the time of cooling the roll, after the cooling water is supplied until the roll is immersed in the pallet, the supply of the cooling water is continued by reducing the amount of the supplied water.
As a result, in the pallet, water that rises in temperature due to heat absorption from the rolls and moves upward due to natural convection is discharged from the overflow drain, and circulation of water that replaces the newly supplied cooling water occurs. As a result, heat removal from the rolls proceeds efficiently, and the cooling time can be further shortened.

According to a fifth aspect of the roll cooling device of the present invention, the pallet is formed with a drain port penetrating a wall surface on the bottom side thereof, while the pallet for water cooling has the drain port of the pallet placed on the pallet table. It is characterized in that a lid opening / closing device for opening and closing the drainage port is provided as water discharge means by bringing the lid body into and out of contact with the lid body. In this case, if the pallet is placed on the pallet mounting table so that the drain opening of the pallet faces the lid opening / closing device provided in the pallet storage area for water cooling, the lid is brought into contact with the drain opening to cool it. Store water,
Further, after the cooling is completed, the lid body can be separated from the drain port to cause a series of operations for draining the stored water in the pallet. As a result, the portable pallet does not need to be provided with a drive source for opening and closing the drainage port, so that the entire structure is simplified.

[0017]

Next, an embodiment of the present invention will be described with reference to the drawings. First, the layout in the rolling mill according to this embodiment will be described with reference to FIG. In this factory, a tandem mill yard Y ₁ in which a tandem cold mill (hereinafter abbreviated as “mill”) 1 is installed,
Coil yard where rolled steel plate coils etc. are temporarily placed
It is divided into a tandem roll shop Y ₃ where Y ₂ and roll regrinding equipment are located.

A roll changing device 2 is provided on the side of the mill 1, and by this device 2 rolls such as work rolls and intermediate rolls that require regrinding and the like are pulled out from the inside of the mill 1. The regrinded roll and the new roll are mounted in the mill 1 and the rolls are recombined.
In the tandem mill yard Y ₁ , the chock attachment / detachment area P ₁ and the roll transfer area P _{2 are} arranged along the roll withdrawal direction by the roll changing device 2 (the direction from the upper side to the lower side in the figure, hereinafter referred to as the AB direction). -The roll temporary storage area P ₃ is sequentially provided. Roll transfer carriages 3 and 3 that reciprocate in the AB direction are provided at both end positions of the chock attachment / detachment area P ₁ and the roll transfer area P ₂ , while the roll transfer area P ₂ and the roll temporary storage area are provided. A pallet carrier parent-child cart 4 that reciprocates in the direction orthogonal to the AB direction (hereinafter referred to as the CD direction) is provided between the P ₃ and the P ₃ .

The trolley traveling area P ₄ in which the pallet conveying parent-child trolley 4 travels is provided beyond the coil yard Y ₂ to the area of the tandem roll shop Y ₃ . Then, positions sandwiching the running region P ₃ in the coil yard Y ₂ and tandem roll shop Y ₃ from AB opposite sides also set as rolled temporary placement area P _3, the coil yard Y ₂ in the roll temporary region P ₃ In the boundary area with the tandem roll shop Y ₃ , _three water cooling pallet storage areas P _C ... Each equipped with roll water cooling equipment described later are provided.

Based on the above layout diagram, the flow of the rolls from the mill 1 will be first outlined. The rolls were moved from the roll changing device 2 to the chock attachment / detachment region P ₁ , and this region was
At P ₁ , the chocks on both ends are removed. Then this region P ₁
It is transferred onto one of the roll transport carriages 3 by the first crane 5 provided in. Then shifted by the carriage 3 and the roll transfer replacement region P ₂ side, then, by the second crane 6 provided in the region P _2, the pallet to be described later are placed on the region P ₂ Reprinted.

This pallet is a pallet carrier parent and child.
Pallet yard P for water cooling by trolley 4 _CIs transported to
Water is cooled. After water cooling, roll is tandem
Le Shop Y_ThreeTo the regrinding process.
Temporary storage area P_ThreeMoved to this area P_ThreePlaced on
It is stored (temporarily placed) on the pallet that is stored. Then on
Provided in each area along the roll flow as described in
The detailed device configuration will be described.

First, in the chock attachment / detachment area P ₁ , as shown in FIG. 16, a plurality of roll support bases 7 ...
A pair of chock attachment / detachment devices 8 and 8 which are movable on both sides in the CD direction are provided. Rolls 9 pulled out from inside the mill 1 by the roll changing device 2 in upper and lower pairs
Are transferred one by one onto the roll support base 7 by the overhead crane 10, and the chocks 11 and 11 at both ends are removed by the chock attachment / detachment device 8 and 8.

After that, the first crane 5 for transferring the roll 9 onto the roll carrier 3 from the roll support base 7 ...
As shown in FIG. 17, consists of a gate-shaped gantry crane equipped with a lifting beam 5b that is vertically moved by a motor cylinder 5a, on rails 12 and 12 laid on the floor,
It is configured to be self-propelled by the traveling drive motor 5c. The hoisting beam 5b is attached to the hoisting beam 5b by the motors 5d and 5d.
A pair of slide units 5e and 5e that are driven horizontally along the lower surface of the unit are provided on both sides of the center, and U-shaped holding ropes are provided at the lower ends of these units 5e and 5e, respectively.
5f and 5f are attached.

The first crane 5 moves to a position on the roll support base 7 and stops, and then the vertical movement of the lifting beam 5b and the horizontal movement of the slide units 5e and 5e cause the roll support base 7 to move. Both ends of the roll 9 in the axial direction are inserted into the holding ropes 5f, 5f, respectively, and the elevator beam 5b is raised in this state, whereby the roll 9 is lifted. Then, the first crane 5 moves to the roll carrier 3 side, and the reverse operation is performed on the carrier 3, whereby the roll 9 is transferred onto the roll carrier 3. As shown in FIG. 18, the first crane 5 is provided with a pair of lifting tool units such as the lifting beams 5b described above. Therefore, the two rolls 9 and 9 can be hoisted by the first crane 5 and can be simultaneously conveyed in a state where they are horizontally arranged.

On the other hand, as shown in FIG. 19, the roll carrier 3 is provided with a pair of roll supporting plates 3b, 3b each having a V-shaped cross section on a base frame 3a thereof. Two rolls 9 and 9 are placed parallel to each other and horizontally on 3b and 3b. As shown in FIG. 20, a traveling drive motor 3c is provided in the base frame 3a, and the trolley 3 is also configured to travel on the rails 13 by the motor 3c. .

As shown in FIG. 21 (b), the roll transport carriage 3 loads the roll 9 and moves from the chock attachment / detachment region P ₁ side to the roll transfer region P ₂ side and stops. In addition,
At both ends of the rail 13 on which the carriage 3 travels, each region P ₁
-Locking devices 14 and 14 for positioning the stop position of the roll carrier 3 at P ₂ are respectively provided. The second crane 6 in the roll transfer area P ₂ is different from the first crane 5 only in the overall height and the width dimension in the AB direction as shown in FIG. The configuration is almost the same. That is, the lifting beam 6a that is moved up and down
And a pair of slide units 6c and 6c each having holding ropes 6b and 6b at the lower end thereof are provided in the CD direction (the direction orthogonal to the paper surface), so that two rolls 9 are provided. -It is configured so that 9 can be simultaneously lifted and conveyed. In addition, the traveling drive motor 6d is configured to be self-propelled on the rail 15. By this second crane 5, two rolls 9 are fed from the roll carrier 3
9 is lifted and transferred to the pallet 16 described later, which is placed in the roll transfer area P ₂ .

By the series of operations of the above-mentioned devices, the upper and lower two rolls 9 and 9 removed from the mill 1 are loaded on the pallet 16 in the roll transfer area P ₂ . Note that the pallet 16 is configured to have a plurality of pairs (for example, four) of rolls, as will be described later. Therefore, the above-described series of operations is performed for two rolls of another upper and lower pair, and these rolls are placed on the other two roll placement portions of the pallet 16 and the four rolls are placed on the pallet 16. When the loading of the book rolls is completed, the pallet 16 is then transported to the water cooling pallet storage area P _C , where the rolls are water cooled.

In this water-cooling pallet yard P _C , the pallet 16 can be used as it is for water-cooling the roll 9. For this purpose, the pallet 16 and the water-cooling pallet yard P _C are constructed. The pallet transport parent-child cart 4 will be described next. First, palette 16
As shown in FIG. 2, a roll support plate 18 is provided in parallel with a base plate 17 forming the bottom wall thereof. Four roll-receiving members 19 each having a V-shaped upper surface are attached to the roll supporting plate 18 at predetermined intervals,
Four rolls 9 are placed horizontally on each of these receiving members 19. On the other hand, a peripheral wall 20 extending substantially vertically upward is provided at the peripheral edge of the base plate 17, and as a result, the pallet 16 is formed in the shape of a substantially rectangular parallelepiped water tank having only an upper surface opened, as shown in FIG. Has been done.

A water discharge portion 21 is provided at a substantially central position on one surface of the peripheral wall 20 (a surface on the right side in the figure), and a water receiving portion 22 and an overflow drain portion 23 are provided on both sides sandwiching the water discharging portion 21. Are provided respectively. The water receiver 22 is shown in FIG.
As shown in FIG. 3, when the water cooling pallet 16 is placed in a water cooling pallet storage area P _C , which is formed by partially bulging the upper end side of the peripheral wall 20 outward, the water receiving portion 22 is placed above the water receiving portion 22. To
A water outlet of a cooling water supply pipe 25 described later is located.

As shown in FIG. 5, the overflow drain portion 23 is constructed such that a part of the peripheral wall 20 is formed as an inner / outer double wall.
Water that has passed over the upper edge of 23a, that is, the overflow drain 23b, is configured to flow down between the inner wall 23a and the outer wall 23c outside thereof. The water discharge part 21
As shown in FIGS. 6 (a) and 6 (b), a drainage channel 21a horizontally penetrating the lower end side of the peripheral wall 20 and an outer opening end of the drainage channel 21a, that is, a lid for opening and closing the drainage port 21b. And a body 21c. The lid 21c is formed by attaching a rubber plate 21e to the inside of an outer plate 21d made of, for example, a steel plate.
The lid 21c is supported at its upper edge by a pivot 21f so as to be rotatable around the pivot 21f.
It is held in a hanging state due to its own weight in the vertical downward direction from 21f. In this state, it is open from the drain port 21b.

On the other hand, in the water cooling pallet yard P _C , as shown in FIG. 2, there is provided a pallet pedestal 24 which supports the pallet 16 from below at a predetermined height position. The pallet table 24 is configured with a space 24a into which a child car 33 of a pallet carrier parent-child car 4 described below can enter, and the pallet 16 is placed on the pallet table 24 in a state of straddling the car entrance space 24a. Placed on.

When the pallet 16 is positioned on the pallet table 24 as described above, as shown in FIG. 1, the pallet 16 is located above the water receiving portion 22 and serves as a water amount control means. A cooling water supply pipe 25 provided with an automatic opening / closing valve 25a is provided as water supply means. Further, a drainage groove 26 is provided at a lower position corresponding to the overflow drainage section 23 and the water discharge section 21, and a lid opening / closing device 27 is provided at a position facing the water discharge section 21.

This device 27, as shown in FIGS. 7 (a) and 7 (b),
The swing arm 27a and an opening / closing cylinder 27b that is an electric cylinder that drives the swing arm 27a are provided. Swing arm 27a
Is supported at its upper end by a first support shaft 27c so as to be swingable around this support shaft 27c, and has a roller-like pressing member 27d attached to its lower end. On the other hand, the first support shaft 27c
A second support shaft 27e is provided obliquely above the second support shaft 27e, and the upper side of the opening / closing cylinder 27b is rotatably supported by the second support shaft 27e around the second support shaft 27e. The cylinder shaft 27 extending obliquely downward from the upper side of the swing arm 27a and the second support shaft 27e of the opening / closing cylinder 27b.
The leading end portion of g is connected to each other via a connecting member 27f. The connecting member 27f is fixed to the swing arm 27a so as to rotate integrally with the swing arm 27a, while the cylinder shaft
It is connected to 27g so that relative rotation is possible.

In the lid opening / closing device 27 described above, when the cylinder shaft 27g is located at its retracted limit, the swing arm 27a is moved.
Is held in a state in which the pressing member 27d at the lower end thereof is located rearward (right side in the figure) from the first support shaft 27c. When the lid opening / closing device 27 is actuated and the cylinder shaft 27g moves forward, the swing arm 27a rotates around the first support shaft 27c in the counterclockwise direction in the figure as indicated by the arrow in the figure. The pressing member 27d at the lower end of the swing arm 27a is attached to the first support shaft 27.
Move forward from c. Along with this operation, the water discharge part 21 in the pallet 16 is
The pressing member 27d is brought into contact with the lid 21c, and the lid 21c is rotated around the pivot 21f. As a result, the drain 21b is closed by the lid 21c and is closed.

Maintaining this state, the cooling water supply pipe 25
Supply water is stored in the pallet 16 by supplying water to the pallet 16 through the. Next, the pallet carrier parent-child cart 4 that carries the pallet 16 will be described. As described above, the carriage 4 carries the pallets 16 from the roll transfer area P ₂ to the water cooling pallet storage area P _C , but as shown in FIG. 16 described above, the roll transfer area P ₂ In this case, similarly to the water cooling pallet storage area P _C , a pallet mounting base 28 for setting the pallet 16 at a predetermined height position is provided. The pallet table 28 is provided with a pallet entry space 28a which is recessed in a U-shape from the end in the B direction toward the A direction so that a pallet carrier 33 of the pallet transport parent-child trolley 4 described later can enter the pallet mount 28. Are formed. Pallet 16
Defines the position so as to straddle this space 28a from above,
It is placed on the pallet table 28.

A pallet rest 29 similar to the above is provided in the roll temporary placement area P ₃ as well.
Temporary placement pallets 38, which will be described later, are arranged side by side horizontally. The pallet transport parent-child truck 4 travels along the rails 31 and 31 laid in the CD direction in the truck traveling area P ₄ described above, and the parent truck 32 travels in the AB direction from within the parent truck 32 and rolls. It is composed of a replacement area P ₂ , a pallet storage area P _C for water cooling, and a child carriage 33 as a pallet transfer carriage capable of traveling into the pallet mounting space of each pallet mounting base 28, 24, 29 in the temporary storage area P ₃ . .

First, as shown in FIG. 8, the child carriage 33 has lift tables 33b and 33b vertically moved by hydraulic cylinders 33a and 33a, respectively, at positions corresponding to both longitudinal ends of the base plate 17 of the pallet 16. It is provided as a pallet transfer means. These tables 33b
The 33b is simultaneously moved up and down so that the pallet 16 placed on the upper surface of the pallet 16b is kept horizontal.

As shown in FIG. 9, this child carriage 33 is also provided with a traveling drive motor 33c at one end, and by driving this motor 33c, as shown in FIG.
Run on the top. The main body frame 33d in which the hydraulic cylinders 33a, 33a, etc. of the child carriage 33 are installed has clamp engaging pieces 33e protruding laterally on both side surfaces thereof.
・ 33e is provided. In these engaging pieces 33e and 33e,
When the engaging operation pieces 36a, 36a of the clamp devices 36, 36 are raised and engaged from the lower side, the child carriage 33 is clamped at a predetermined stop position described later.

On the other hand, as shown in FIG. 11, the parent carriage 32 is provided with a child stand vehicle-mounted portion 32a at the center thereof, and the traveling drive portions are arranged on both sides in the CD direction with the child table-mounted portion 32a interposed therebetween.
32b and 32b are provided. The above-mentioned rectangular rails 35, 35 are laid on the upper surface of the child stand vehicle-mounted part 32a. Therefore, on the rails 35, 35, that is, the traveling drive part 32.
The child carriage 33 travels in the AB direction (the direction perpendicular to the paper surface in the figure) between b and 32b, and from the inside of the parent carriage 33, as will be described later, the roll transfer area P ₂ and the water cooling pallet storage area P _C.
Each pallet stand can be driven into.

The traveling drive units 32b and 32b are provided with pallet support beams 32c ...
The upper surface height position of the support beams 32c, 32c is set between the upper limit height and the lower limit height of the lifting table 33b of the child carriage 33. As a result, the child cart 33 is moved up and down the table 33b.
With the pallet 16 placed on the upper limit height position, it is possible to move from the roll transfer area P ₂ into this parent carriage 32, and inside the parent carriage 32. By lowering the lifting table 33b at the stop position,
The pallet 16 is transferred from the child cart 33 to the parent cart 32 in a state of straddling the pallet support beams 32c and 32c.

When the parent carriage 32 moves in the CD direction, the child carriage 33 is stopped and held at the central position inside the parent carriage 32 as shown in FIG. In order to clamp the child carriage 33 at this position, a clamp device 36 that engages with the clamp engaging piece 33e of the child carriage 33 is provided in the child-vehicle-mounting portion 32a. On the other hand, as shown in FIG. 13, the connection rails 32 are respectively provided at both ends in the AB direction of the child stand vehicle-mounted part 32a.
A rail flip-up mechanism 32e having d · 32d is provided. That is, the mechanism 32e is laid on the rail 35 on the child table on-vehicle mount 32a and the rails laid on the roll transfer area P ₂ and the water cooling pallet storage area P _C / temporary storage area P ₃ , respectively.
35 'and the state in which the connection rail 32d is held in the horizontal position and the state in which the connection rail 32d is flipped up and held vertically so that they are connected to each other via the connection rail 32d are hydraulically switched. The operation is performed by the cylinder 32f. Parent bogie 32 in the above-mentioned splashed state
Is traveling in the CD direction, and in this state, traveling is possible without causing interference with the second crane 6. As shown in the figure, the traveling drive motor 32 in the traveling drive unit 32b of the parent carriage 32 is shown.
By the operation of g, the parent cart 32 runs on the rail 31 laid on the floor.

14 (a) and 14 (b) show a temporary placement pallet 38 placed in the temporary placement area P ₄ . This pallet 38
Also, on the flat base plate 38a, four rolls 9
So that they can be placed horizontally next to each other, each section V
A support plate 38b having four letter-shaped roll receiving portions is provided. The base plate 38a is formed in such a size that it can be lifted by the elevating tables 33b, 33b of the child carriage 33. Therefore, the temporary pallet 38 can also be carried by the pallet carrying parent and child carriage 4. Has become.

Next, the operation of water-cooling the rolls in the water-cooling pallet yard P _C will be described. As described above, when the loading of the four rolls 9 on the pallet 16 for water cooling on the pallet table 28 in the roll transfer area P ₂ is completed, the pallet 16 is then palletized for water cooling by the pallet carrier parent / child cart 4. It is transported to the storage area P _C. That is, the parent carriage 32 moves in the CD direction and stops at a position facing the pallet 16 in the roll transfer area P ₂ . Then child car
The 33 moves into the recessed space 28a of the pallet table 28 with the lifting table 33b in the lower limit position, and stops below the pallet 16. Then, the elevating table 33b is raised, whereby the pallet 16 is transferred from the pallet table 28 onto the elevating table 33b. Then child car
When the pallet 16 is held on the pallet transporting parent-child truck 4 by moving the pallet 16 back onto the parent trolley 32 and stopping.

After that, the pallet transporting parent-child truck 4 turns the CD
By moving in the direction and stopping at a position facing a predetermined water-cooling pallet storage yard P _C , and at this position, the sub-carriage 33 enters the water-cooling pallet storage P _C and performs the opposite operation to the above. The pallet 16 is transferred onto the pallet stand 24 of the water cooling pallet yard P _C. When the pallet 16 is placed on the pallet table 24 in this way, the opening / closing cylinder 27b of the lid opening / closing device 27 is first driven by, for example, the operator operating the water cooling process start button. That is, the cylinder axis
27f is driven from the retracted position to the advanced position, whereby the lid 21c of the water discharge part 21 in the pallet 16 is
As described above, the drainage port 21b is maintained in the closed state from the opened state up to that point.

Next, the automatic opening / closing valve 25a is opened, whereby the supply of the cooling water into the pallet 16 through the cooling water supply pipe 25 is started. The supply of this cooling water is continued until the water level in the pallet 16 reaches the overflow drain port 23b. When this is detected by, for example, a float switch (not shown) or the like, the opening degree of the automatic opening / closing valve 25a is narrowed down, whereby the amount of supplied water is switched to a small amount. Therefore, thereafter, the amount of water commensurate with the amount of supplied water overflows and is maintained until the time preset in the timer elapses.

During this period, as shown in FIG. 1, the cooling of the rolls 9 in the pallet 16 proceeds while being immersed in the cooling water. Then, after a lapse of a predetermined time, a cooling stop operation is performed. That is, first, the water supply from the cooling water supply pipe 25 is stopped, and then the opening / closing cylinder in the lid opening / closing device 27.
The drive of 27b is stopped, and the cylinder shaft 27f moves backward.
As a result, the pressing force of the water discharger 21 on the lid 21c in the lid closing direction is released. As a result, the drainage channel 21a is switched to the open state, and all the water in the pallet 16 is drained to the drainage channel 26 through the drainage channel 21a.

The roll 9, which has been cooled to near room temperature by the water cooling operation as described above, is then conveyed from the pallet 16 to the grinding equipment in the tandem roll shop Y ₃ for grinding, or The rolls are transferred and temporarily placed on the temporary placement pallet 38 in the temporary placement area P ₃ . At this time, the roll 9 is conveyed by using a tandem roll shop Y ₃ and a crane and a suspender (not shown) provided in the roll temporary placement area P ₃ .

The rolls that do not need water cooling immediately after the rolls are recombined in the mill 1 are transported from the roll transfer region P ₂ to the roll temporary storage region P ₃ and stored therein. At this time, the temporary pallet 38 is placed on the pallet table 28 in the roll transfer area P _{2 and} the pallet 38 is transferred from the roll transfer area P ₂ to the roll temporary storage area P by the pallet conveying parent-child cart 4. _The operation to carry to ₃ is performed.

On the other hand, in the tandem roll shop Y ₃ , the regenerated rolls which have been subjected to shot blasting and plating after grinding and have been completely regenerated are also placed on the temporary pallet 38 in the temporary roll placement area P _3. Transferred to the mill 1
It is stored in this area P ₃ until the roll is reassembled in. At the time of roll rearrangement, the pallet carrier parent-child cart 4 conveys the pallet 38 for temporary placement from the roll temporary placement area P ₃ to the roll transfer area P ₂ . Then, contrary to the above, the rolls are transferred from the roll transfer area P ₂ to the roll transfer carriage 3 by the second crane 6 and transferred from the carriage 3 to the chock attachment / detachment area P ₁ by the first crane 5 to attach the chocks. To be Next, the mill 1 by the roll changing device 2
Will be incorporated into.

As described above, in this embodiment, when cooling the rolls recombined by the mill 1,
The water-cooled pallet 16 of the tank shape capable of reserving the cooling water is provided, after which was conveyed by the pallet conveying child carriage 4 into the water-cooled pallets Area P _C, using the pallet 16 as it is, water cooling line of the roll 9 Be seen. As a result, it is not necessary to transfer the rolls 9 at the water cooling pallet storage area P _C , so the work load is reduced.

On the other hand, since the roll is cooled while being immersed in the cooling water, the entire roll 9 can be cooled uniformly, and the cooling time can be shortened as compared with the conventional case. For example, as a result of analyzing the time required to cool the temperature in the central part from 90 ℃ to 40 ℃ for a roll composed of roll diameter: 500mm, total length: 4300mm, material: Ni3.5% -Cr1% cast steel Then, the cooling water temperature is 25 ℃
For 26 minutes, for 30 ° C 31 minutes, for 35 ° C
40 minutes. The conventional cooling with shower water requires at least 2 hours or more, including the subsequent uniform cooling waiting time. Therefore, by adopting the water cooling method by immersion, it is possible to greatly reduce the cooling time,
Moreover, the amount of cooling water can also be reduced by this.

Furthermore, in the above-described embodiment, the water-cooled pallet of the pallet 16 is moved by the child carriage 33 of the pallet carrier parent-child carriage 4 entering the pallet stand 24 in the water-cooling pallet storage area P _C and lowering the lifting table 33b. Transfer to the storage area P _C is performed. Therefore, it is not necessary to transfer the pallet by using a crane, etc., and this makes it possible to automatically perform a series of water-cooling operations following the roll transfer, further reducing the work load. it can.

Further, the pallet 16 has a structure in which a plurality of, for example, four rolls 9 ... Are supported from below in a one-stage stacked state in which they are arranged in parallel with each other and in the horizontal direction. Therefore, even when the roll 9 is stored in the pallet 16 or taken out after cooling by using a crane, a suspending tool or the like, since the storage height position of each roll 9 is constant, the vertical positioning of the suspending tool is performed. Easy to control. As a result, the operation of raising and lowering the roll 9 to and from the pallet 16 is simplified,
The automation becomes easy.

On the other hand, the roll is cooled by supplying a small amount of cooling water into the pallet 16 and causing the stored water to overflow. As a result, the water that rises in temperature due to heat absorption from the roll 9 and moves upward due to natural convection is discharged through the overflow drain port 23c, and the water in the pallet 16 is replaced so as to replace the newly supplied cooling water. The circulation of As a result, the heat removal from the roll 9 progresses efficiently, and the cooling time is further shortened.

Further, in the above, the pallet 16 has a drain port 21b.
And a lid 21c which can be attached to and detached from the lid 21c, and a lid opening / closing device 27 for pushing the lid 21c is provided in the water cooling pallet storage area P _C. As a result, the pallet 16 is attached to the lid 21c described above.
The lid opening / closing device 27 is positioned so as to face the lid opening / closing device 27 and placed on the pallet table 24.
The opening and closing of b is performed. Therefore, a plurality of pallets 16 are provided, and these pallets 16 are alternately arranged in the water cooling pallet storage area P _C.
Even when the rolls 9 are transported to the water and water-cooled, it is not necessary to provide a drive source for opening and closing the drain port 21b in each of these portable pallets 16, so the overall configuration Will be easier.

The above embodiment is not intended to limit the present invention, and various modifications can be made within the scope of the present invention. For example, in the scope of claim 1, in the water cooling pallet storage area, the water cooling pallet 16 transported by the trolley may be transferred onto the pallet mounting table in this storage area using a crane or the like. it can. In addition, in the above-described embodiment, the lid 21c that comes into contact with and separates from the drainage port 21b of the pallet 16 is provided on the pallet 16 side, but it may be configured to be provided at the position of the pressing member 27d in the lid opening / closing device 27. Etc. are also possible.

[0057]

As described above, according to the first aspect of the present invention,
In the roll cooling device, since the pallet transported by the pallet transport cart is formed in the shape of a water tank capable of storing water, the pallet for the water cooling is accommodated by accommodating the rearrangement roll in the rolling mill in this pallet. After being transported, the rolls can be water-cooled with the rolls kept in the pallets. Therefore, since it is not necessary to transfer the roll, the work load in cooling the roll is reduced.

In addition, when the roll is immersed in the cooling water, a substantially uniform heat exchange state over the entire length of the roll can be generated with the cooling water. As a result, the non-uniform cooling in the roll longitudinal direction, which occurs in the conventional shower method, is avoided, and as a result, the roll cooling time can be shortened. In the roll cooling device according to claim 2, the pallet carrier moves into the pallet carrier space of the pallet table in the water cooling pallet yard, and the pallet that has been conveyed is lowered to move the pallet from the pallet carrier to the pallet table. Therefore, it is not necessary to use a crane or the like for this pallet transfer, and the work load can be further reduced.

In the roll cooling device according to the third aspect, since the pallet is configured to store a plurality of rolls in a stacked state of one stage, the pallet is used to store the recombined rolls in the rolling mill and the rolls are taken out after cooling. Even when the operation is performed by using a crane and a hanger, the storage height position of each roll is constant, and therefore the operation of raising and lowering the roll to and from the pallet becomes easy. As a result, it is easy to automate this, which also reduces the work load.

In the roll cooling device of the fourth aspect, a state in which water whose temperature has risen due to heat absorption from the rolls is discharged from the overflow drain port and is circulated so as to be replaced with the newly supplied cooling water Since the roll is cooled by, heat removal from the roll progresses efficiently, and thereby the cooling time can be further shortened. Claim 5
In the roll cooling device, if the pallet is placed on the pallet mounting table so that the drainage port of the pallet faces the lid opening / closing device provided in the pallet storage area for water cooling, the lid opening / closing device allows Of cooling water to
A series of operations with drainage of water after cooling can occur. As a result, the portable pallet does not need to be provided with a drive source for opening and closing the drainage port, so that the entire structure is simplified.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a configuration of a water cooling pallet and a water cooling pallet storage used in a roll cooling device according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line U-U in FIG.

FIG. 3 is a plan view of a pallet.

FIG. 4 is a partial cross-sectional view showing the structure of the water receiving portion of the pallet.

FIG. 5 is a partial cross-sectional view showing a structure of an overflow drainage portion of a pallet.

6A and 6B show the structure of the water discharge part of the pallet, wherein FIG. 6A is a partial sectional view and FIG. 6B is a view taken along the line VV in FIG. 6A.

FIG. 7 is a view showing a relationship between a lid opening / closing device for a water cooling pallet storage area and a water discharging portion of the pallet, wherein FIG. 7 (a) is a plan view and FIG. 7 (b) is a partially cutaway front view. .

FIG. 8 is a front view of a child carriage of a pallet conveying parent-child carriage that conveys the pallet.

FIG. 9 is a plan view of a child cart.

FIG. 10 is a side view of the child cart.

FIG. 11 is a front view of the pallet transporting parent-child cart.

FIG. 12 is a plan view of a pallet conveying parent-child cart.

FIG. 13 is a side view of a pallet conveying parent-child cart.

FIG. 14 is a view showing a temporary storage pallet,
(a) is a front view and (b) is a side view.

FIG. 15 is a plan view showing a layout in a factory provided with the roll cooling device.

FIG. 16 is a perspective view showing a partial configuration in the factory.

FIG. 17 is a front view of the first crane provided in the factory.

FIG. 18 is a side view of the first crane.

FIG. 19 is a front view of a roll carrier truck provided in the factory.

FIG. 20 is a plan view of a roll carrier.

FIG. 21 shows the positional relationship between the first and second cranes and the roll carrier in the above factory.
The front view of a 2nd crane and the same figure (b) are the front views which show a roll conveyance vehicle and its travel route.

FIG. 22 is a front view showing a water cooling operation state using a conventional water cooling roll stand.

[Explanation of symbols]

P _C Pallet storage for water cooling 1 Mill (rolling mill) 4 Pallet transfer parent-child trolley 9 Roll 16 Pallet 18 Roll support plate (roll support part) 21b Drain 21c Lid 23b Overflow drain 24 Pallet stand 24a Trolley entry space 25 Cooling water Supply pipe (water supply means) 25a Automatic opening / closing valve (water amount control means) 27 Lid opening / closing device (water discharge means) 32 Parent carriage 33 Child carriage (pallet transfer carriage) 33b Lifting table (pallet transfer means)

Claims (5)

[Claims] 1. A pallet for accommodating rolls recombined by a rolling mill and a pallet carrier for transporting the pallet to a water cooling pallet storage area are provided, and the pallet soaked in the pallet is immersed in the pallet. While being formed in a water tank shape capable of storing water until a state is reached, a water supply means for supplying cooling water to a pallet table for water cooling, which is placed in a pallet table mounted on this pallet table, And a water discharge means for discharging the water in the pallet. 2. A pallet platform of a water cooling pallet yard is provided with a trolley entry space into which a pallet carrier can enter, and the pallet carrier is lowered to extend over the pallet carrier. 2. The roll cooling device according to claim 1, further comprising pallet transfer means for transferring the pallet on the pallet table in a state of being set. 3. A pallet is internally provided with a roll supporting portion for supporting each roll from below in a stacked state in which a plurality of rolls are arranged parallel to each other and in the horizontal direction. Item 3. The roll cooling device according to Item 1 or 2. 4. The pallet is provided with an overflow drainage port at a predetermined water level position where the roll inside is immersed, while the water supply means supplies the stored water in the pallet after reaching the predetermined water level. 4. The roll cooling device according to claim 1, further comprising water amount control means for controlling the amount of water to be controlled so as to continue supplying the cooling water for a predetermined time. 5. The pallet is formed with a drain port penetrating the wall surface on the bottom side thereof, and the lid is brought into contact with and separated from the drain port of the pallet placed on the pallet table in the water cooling pallet yard. 5. The roll cooling device according to claim 1, wherein a lid opening / closing device for opening / closing the drainage port is provided as the water discharging means.