JP2006212688A - Equipment and method for cooling steel sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide equipment and a method for cooling a steel sheet, by which, a hot steel sheet can be cooled at a cooling speed suitable for a purpose, and the inside and both surfaces of the steel sheet can be uniformly cooled. <P>SOLUTION: The equipment 10 for cooling the steel sheet has a plurality of upper and lower spray units 14, 15 for cooling the hot steel sheet 13 to be carried by being nipped by means of a lower water-squeezing roll 11 and an upper water-squeezing roll 12. In the equipment 10 for cooling the steel sheet, the spray units 14, 15 comprise a box shape housing 17 having a water supply port 16, a casing 18 which is dismountably retained in the box shape housing 17 and has a water chamber 23 formed therein so as to communicate with the water supply port 16, a plurality of water nozzles 31 to be connected to the water chamber 23, flow rate regulating valves 41 for controlling the quantity of the water to be supplied to the water chamber 23 provided at least within the region except for the central portion of the steel sheet 13 in the direction of its width, and strikers 49, 50 which can adjust the opening of the respective flow rate regulating valves 41 by moving in the direction of the width of the steel sheet. The spray units 14, 15 can control the cooling operation so as to uniformly cool the steel sheet 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

TECHNICAL FIELD The present invention relates to a steel plate cooling facility and a steel plate cooling method for cooling a high temperature steel plate at a cooling rate according to the purpose and uniformly cooling the in-plane and front and back surfaces of the steel plate.

In recent years, in the steel plate manufacturing process, high strength and high toughness are achieved by combining controlled rolling characterized by large rolling under low temperature and controlled cooling characterized by air cooling after rapid cooling to around 500 ° C. The technology to obtain steel sheets is widely applied to actual production. By this method, a high strength and high toughness steel plate having a low alloy and excellent weldability can be produced at low cost.
In order to effectively perform controlled cooling, a technology that can rapidly cool to the target temperature in order to obtain a fine-grained structure, and a steel plate surface that does not deteriorate the uniformity of the material or the shape of the steel plate even if rapid cooling is performed. Or the technique which cools the front and back uniformly is required. The demands on these technologies are becoming stricter as the demands on the performance of steel sheets become more advanced. To cope with this, in order to increase the cooling rate when cooling hot steel sheets, the amount of cooling water or cooling water is increased. Speeding up and the like are effective, and many methods of ejecting high-pressure water from a spray nozzle or a slit nozzle onto a steel plate have been used.
However, in these methods, in cooling the upper surface of the steel plate, the cooling water ejected from the nozzle collides with the upper surface of the steel plate, then flows on the steel plate, becomes interference water, and flows out from the steel plate side (end portion). For this reason, finally, the cooling capacity in the sheet width direction of the steel sheet becomes larger at the end of the sheet width, resulting in uneven cooling in the sheet width direction.

As a conventional technique for preventing this, a cooling device that cools a steel sheet by injecting cooling water together with compressed air using a double-structure cooling header composed of an outer cooling header and an inner cooling header is disclosed (for example, Patent Document 1).
In this cooling device, mask members that move in the longitudinal direction of the header are provided at both ends of the inner cooling header having a compressed air injection nozzle. This mask member cuts off the injection of compressed air supplied to the inner cooling header, and its positioning is performed by a motor drive via a screw rod provided laterally inside the inner cooling header.
By comprising in this way, the injection width | variety of the cooling water injected from a cooling device can be controlled by changing the position of a mask member.

JP-A-6-246333 (FIG. 2)

However, the prior art described in Patent Document 1 still has the following problems to be solved.
Since the opening / closing control of the compressed air injection nozzle is performed only by the on / off control by traversing the mask member, the injection amount of the cooling water cannot be adjusted, and the cooling rate of the steel sheet cannot be controlled.
Also, since the mask member is provided on the inner cooling header, when the compressed air injection nozzle is closed by the mask member, the injection of compressed air from the compressed air injection nozzle is blocked, but the water outside the inner cooling header is cooled. Since it drips from the water jet nozzle, it was not preferable in the cooling control of the steel sheet.

The present invention has been made in view of such circumstances, and provides a steel plate cooling facility and a steel plate cooling method that can cool a high-temperature steel plate at a cooling rate according to the purpose and uniformly cool the in-plane and front and back surfaces of the steel plate. The purpose is to do.

The steel sheet cooling facility according to the first aspect of the present invention includes a plurality of sewage draining rolls arranged side by side, an upper draining roll disposed above and below the sewage draining roll so as to be movable up and down, and the lower A steel plate having a plurality of upper and lower spray units arranged between a water draining roll and the upper water draining roll and cooling a hot steel plate conveyed while being sandwiched between the lower water draining roll and the upper water draining roll. In cooling equipment,
One or both of the upper and lower spray units are
A box-shaped housing with a water supply port connected to a water source;
A casing in which a water chamber is formed that is removably accommodated in the housing and is divided into a plurality of portions in the plate width direction of the steel plate in communication with the water supply port.
A plurality of water nozzles coupled to the water chamber, each disposed with a gap therebetween;
A flow rate adjusting valve that controls the amount of water supplied to the water chamber provided at least in a region excluding the central portion in the plate width direction of the steel plate;
A striker that moves in the plate width direction and can adjust the opening degree of each of the flow rate adjustment valves.
Here, the flow rate regulating valve for controlling the amount of water can be provided not only in the water chamber in the region excluding the central portion in the plate width direction of the steel plate, but also in the water chamber in the region in the central portion in the plate width direction of the steel plate. .

The steel sheet cooling facility according to the second aspect of the present invention comprises a plurality of sewage draining rolls arranged side by side, an upper draining roll disposed to be movable up and down above the sewage draining roll, and the lower A steel plate having a plurality of upper and lower spray units arranged between a water draining roll and the upper water draining roll and cooling a hot steel plate conveyed while being sandwiched between the lower water draining roll and the upper water draining roll. In cooling equipment,
One or both of the upper and lower spray units are
A box-shaped housing having an air supply port and a water supply port respectively connected to an air source and a water source;
A casing that is detachably housed in the housing, and that forms a water chamber communicating with the water supply port and an air chamber communicating with the air supply port in two upper and lower stages;
A plurality of air-water nozzles directly connected to the water chamber and the air chamber, each disposed with a gap;
A flow rate adjusting valve that controls the amount of water supplied to the water chamber provided at least in a region excluding the central portion in the plate width direction of the steel plate;
A striker that moves in the plate width direction and can adjust the opening degree of each of the flow rate adjustment valves.
Here, the flow rate regulating valve for controlling the amount of water can be provided not only in the water chamber in the region excluding the central portion in the plate width direction of the steel plate, but also in the water chamber in the region in the central portion in the plate width direction of the steel plate. .

The cooling method for a steel sheet according to the present invention that meets the above-described object is that the water or air-water nozzle is connected to the upper and lower surfaces of the high-temperature steel sheet that is conveyed while being sandwiched between the sewage draining roll and the upper draining roll. In the method for cooling a steel plate, which cools the steel plate by injecting air water,
The distribution of the amount of water in the sheet width direction of the steel sheet restricts the amount of water in an area excluding the central part in the sheet width direction of the steel sheet, and supplies a constant amount of water in other areas.

In the steel sheet cooling facility according to claim 1, the flow rate adjusting valve that controls the amount of water supplied to the water chamber provided at least in a region excluding the central portion in the plate width direction of the steel plate, and moves in the plate width direction Since the striker capable of adjusting the opening degree of each flow rate adjustment valve is provided, the opening degree of each flow rate adjustment valve can be adjusted by adjusting the movement position of the striker. Moreover, since each flow regulating valve can supply and stop water, it is possible to prevent water from flowing down.
Thereby, a high-temperature steel plate can be cooled uniformly in the surface of a steel plate, and front and back, with the cooling rate according to the objective.
In particular, in the steel sheet cooling equipment according to claim 1 and claims 3 to 5 dependent thereon, either one or both of the upper and lower spray units can be detached in a housing having a water supply port. Since it has a casing having a water chamber that is housed and communicated with the water supply port and a plurality of water nozzles connected to the water chamber, it is easy to manufacture and assemble the housing and casing of the upper and lower spray units. In addition, maintenance of the water nozzle can be facilitated. That is, when the water nozzle is replaced due to blockage of the water nozzle, the water nozzle can be removed from the housing together with the casing, and the water nozzle can be easily replaced.

Further, in the steel sheet cooling equipment according to claim 2 and claims 3 to 5 dependent thereon, either one or both of the upper and lower spray units are provided in a housing provided with an air supply port and a water supply port. A casing in which the air chamber communicated with the air supply port and the water chamber communicated with the water supply port are formed in two upper and lower stages, and a plurality of air-water directly connected to the air chamber and the water chamber Therefore, the housing and casing of the upper and lower spray units can be easily manufactured and assembled, and maintenance of the air-water nozzle can be facilitated. That is, when the air water nozzle is replaced due to blockage of the air water nozzle or the like, the air water nozzle can be removed from the housing together with the casing, and the air water nozzle can be easily replaced.

In the steel plate cooling facility according to claim 3, the striker is brought into contact with the plunger of the direct-acting flow rate adjusting valve to limit the amount of water to the water chamber. Therefore, the amount of water is controlled by mechanically controlling the flow rate adjusting valve. Since the adjustment can be performed reliably and no electrical control is required, the cost required for electrical connection is not required.
In the steel plate cooling facility according to claim 4, the striker is brought into contact with the rotating cam provided on the ball of the rotary flow rate adjusting valve to limit the amount of water to the water chamber. The amount of water can be reliably adjusted by controlling, and since no electrical control is required, the cost required for electrical relations becomes unnecessary.
Furthermore, since the steel plate cooling equipment according to claim 5 forms the height of the striker in multiple stages and changes the amount of water in a plurality of stages, fine adjustment of the amount of water can be performed with a simple configuration.

In the method for cooling a steel sheet according to claims 6 and 7, the amount of water is reduced in a region excluding the central portion in the plate width direction of the steel plate, and a water amount distribution for supplying a constant amount of water is obtained in other regions. The amount of water can be made constant regardless of the width of the steel plate. As a result, for example, a cooling water control valve that can be adjusted according to only the required cooling capacity can be used, so the number of control valves and the specifications can be reduced compared to the case where this control valve is not used. The initial equipment cost can be reduced.
In particular, the method for cooling a steel sheet according to claim 7 stops the water supply further outside the both ends in the sheet width direction of the steel sheet, so that, for example, the running cost can be reduced by reducing the water supply power.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a schematic explanatory view of an upper spray unit used in the steel sheet cooling facility according to the first embodiment of the present invention, and FIG. 2 is a schematic side view of the steel sheet cooling facility, FIG. 3 is an enlarged view of the main part of the upper spray unit used in the cooling equipment for the steel plate, FIG. 4 is an explanatory view showing the operating state of the flow rate adjusting valve of the upper spray unit, and FIG. 5 is a second embodiment of the present invention. FIG. 6 is an explanatory view showing an operating state of a flow rate adjustment valve of the upper spray unit, and FIG. 7 is an essential part of the upper spray unit according to a modification. It is an enlarged view.

As shown in FIGS. 1 to 4, the steel sheet cooling facility 10 according to the first embodiment of the present invention is arranged above the sewage draining rolls 11 and a plurality of sewage draining rolls 11 arranged side by side. A plurality of (high temperature) steel plates 13 that are disposed between the upper draining roll 12, the adjacent lower draining roll 11 and the upper draining roll 12 and are transported while being sandwiched between the lower draining roll 11 and the upper draining roll 12 ( In the present embodiment, there are upper and lower spray units (hereinafter also referred to as an upper spray unit and a lower spray unit) 14 and 15, respectively two at the top and bottom. The upper draining roll 12 can be moved up and down by driving a hydraulic jack provided on a gate-shaped mounting base (not shown), and the height of the lower draining roll 11 is fixed. This will be described in detail below.

As shown in FIGS. 1 to 3, the upper spray unit 14 includes a box-shaped housing 17 having a water supply port 16 and a casing 18 detachably housed in the housing 17.
The housing 17 has a pair of rectangular vertical plates 19 and 20 that are vertically arranged opposite to each other at an interval parallel to the conveying direction of the steel plate 13 and a vertical intermediate position between the vertical plates 19 and 20. And a rectangular horizontal plate 22 detachably fixed via bolts 21. The upper spray unit 14 can be lifted and lowered integrally with the upper water draining roll 12, but the lower spray unit 15 does not move up and down.

A plurality of water chambers 23 divided into a plurality (21 in FIG. 1) along the plate width direction of the steel plate 13 are formed in the casing 18, and each water chamber 23 communicates with the water supply port 16.
A downstream end portion of a cooling water pipe 25 communicating with a water supply port 16 provided in an upper portion of the housing 17 is connected to the ceiling portion 24 of the casing 18, and the ceiling portion 24 of the casing 18 is connected to the horizontal portion of the housing 17. It is disposed in contact with the lower surface 26 of the plate 22. Each water chamber 23 has a rectangular partition plate 30 in contact with the inner surfaces of the ceiling portion 24, both side portions 27 and 28, and the bottom portion 29 of the casing 18 in the casing 18 with a predetermined interval (pitch P ) Is provided. The partition plate 30 is detachably attached to the ceiling portion 24 via bolts (not shown).

A plurality of water nozzles 31 are detachably attached to the bottom 29 of the casing 18 by a screw fastening mechanism with a gap therebetween. The water 32 supply ports (water supply holes) 33 to the water nozzles 31 are located in the water chambers 23, and the water 32 ejection ports of the water nozzles 31 protrude from the bottom surface of the bottom 29. In addition, it is preferable that the water nozzles 31 are arranged at regular intervals and shifted by half a pitch for each grid point or each column. Further, the shape of the cross section of the water 32 ejected from the water nozzle 31 is preferably a perfect circle.
A rectangular plate-like apron 34 is integrally connected to the lower surface of the bottom 29 of the casing 18 by a plurality of screws (bolts) 35, and the apron 34 is connected to the lower surfaces of the vertical plates 19 and 20 of the housing 17. It is detachably attached via a (bolt) 36. The apron 34 is formed with a substantially cylindrical opening 37 into which the tip of the water nozzle 31 protruding from the bottom 29 of the casing 18 is fitted.

Here, 21 water chambers 23 are provided in the casing 18 along the plate width direction, and one apron 34 is detachably attached to the seven water chambers 23. That is, three aprons 34 are provided side by side along the plate width direction, and the casing 18 is constituted by three casing divided bodies 18 a corresponding to the aprons 34. The number of water chambers 23 and the number of aprons 34 are not limited to this.
With this configuration, water 32 is supplied to each water chamber 23 by being branched from a water supply header pipe 38 connected to a water supply source, for example, a water supply pump. In addition, the water 32 is directly supplied to the seven water chambers 23 in the center part in the plate width direction through the respective water supply pipes 39 branched from the water supply header pipe 38. On the other hand, the supply of water 32 to a total of 14 water chambers 23 located on both sides is performed via a flow rate adjustment valve 41 provided in each water supply pipe 40 branched from the water supply header pipe 38. . As described above, the flow regulating valve 41 is used for each water chamber 23 in the region excluding the central portion in the plate width direction of the steel plate 13, but also in each water chamber 23 in the central portion in the plate width direction of the steel plate 13, that is, It is also possible to use it for all the water chambers 23.

As shown in FIG. 3, the direct-acting flow rate adjusting valves 41 are arranged along the plate width direction of the steel plate 13, and are formed at the downstream end of the water supply pipe 40 and the horizontal plate 22 of the housing 17. 16 is provided. In the flow rate adjusting valve 41, a flow path 42 that connects the downstream end of each water trough 40 and the water supply port 16 is formed inside, and a valve block 44 that is attached to the upper surface 43 of the horizontal plate 22 of the housing 17 by a screw fastening mechanism. And a plunger 45 that is provided in the middle of the flow path 42 and adjusts the cross-sectional area of the flow path 42. A plunger 45 that is provided with a water supply path 46 that communicates with the flow path 42 and that moves back and forth in the vertical direction is constantly urged downward by a coil spring 48 set via a bracket 47 provided at the upper part of the valve block 44. In the state shown in FIG. 3 where no force is applied to the plunger 45 from below, the flow rate adjustment valve 41 is fully open (100%).

FIG. 4 specifically shows one side portion of the upper spray unit 14 shown in FIG. 1 in the plate width direction. As shown in these drawings, the plunger 45 is a striker that moves along the plate width direction. As a result, the opening of the flow rate adjustment valve 41 can be adjusted from the fully open state to the fully closed state (0%). The striker 50 provided on the other side portion of the upper spray unit 14 in the plate width direction is mirror-symmetrical with the shape of the striker 49, and moves forward and backward simultaneously with the striker 49.

As shown in FIG. 4, the spherical surface 51 of the lower end portion of the plunger 45 is in contact with the upper side of the striker 49 (the same applies to the striker 50), and the inner side of the steel plate 13 in order from the outer side in the plate width direction. A large inclined surface 52 that is largely inclined upward, an upper horizontal surface 53 that is connected to the large inclined surface 52, an upper and lower inclined surface 54 that is connected to the upper horizontal surface 53 and is slightly inclined downward along the inner side, and an upper and lower inclined surface A lower horizontal plane 55 connected to the surface 54 and a lower small inclined plane 56 connected to the lower horizontal plane 55 and slightly inclined downward toward the inside are formed. When the pitch of the plunger 45 is P, the horizontal distance of the large inclined surface 52 is about 0.8 P, the horizontal distance of the upper horizontal surface 53 is about 1.5 P, the horizontal distance of the upper and lower inclined surface 54 is about 0.5 P, and the lower side The horizontal distance of the horizontal surface 55 is about 0.3 P, and the horizontal distance of the lower small inclined surface 56 is about 0.5 P. The horizontal distances of the large inclined surface, upper horizontal surface, upper and lower inclined surface, lower horizontal surface, and lower small inclined surface formed on the striker are not limited to this, and the number of steps can be increased. is there. Thereby, finer water volume adjustment is possible.
Thus, by forming the height positions of the strikers 49 and 50 in multiple stages, the opening degree of the flow rate adjustment valve 41 can be adjusted, and the amount of water can be changed in multiple stages.

As shown in FIG. 4, each flow rate adjustment valve 41 located on both sides (ie, outside and inside the striker 49 in the plate width direction) where the plunger 45 is not in contact with the striker 49 is fully opened. The two central flow rate adjusting valves 41 in contact with the upper horizontal surface 53 are in a fully closed state, and the flow rate adjusting valve 41 on the striker 49 in which the plunger 45 is in contact with the lower horizontal surface 55 is in a 50% open state. Yes. Accordingly, when the striker 49 is moved one pitch outward in the plate width direction from this state, the outermost flow rate adjustment valve 41 is pushed upward from the fully open state along the large inclined surface 52 and comes into contact with the upper horizontal surface 53. The outer flow rate adjustment valve 41 is still in the fully closed state, and the inner flow rate adjustment valve 41 is a plunger along the upper and lower inclined surfaces 54. 45 is pushed down to the 50% open state from the fully closed state, and the innermost flow rate adjustment valve 41 on the striker 49 is pushed down from the 50% open state along the lower inclined surface 56, and the striker 49 It will come off and become fully open.

As shown in FIGS. 3 and 4, a nut member 58 is attached to the lower part of the striker 49 (the same applies to the striker 50) via an attachment bracket 57. A female screw formed on the nut member 58 is screwed into a male screw formed on a screw shaft 59 driven by an electric motor (not shown). The male screw of the screw shaft 59 and the female screw of the nut member 58 are formed as reverse screws on the striker 49 side and the striker 50 side.
With this configuration, by rotating the screw shaft 59 by driving the electric motor, the strikers 49 and 50 can be simultaneously moved back and forth in the plate width direction via the nut member 58 symmetrically.

Here, as shown in FIG. 1, the case where each striker 49 and 50 is arrange | positioned in the board width direction both-sides position, and the steel plate 13 is cooled is demonstrated.
As shown in FIG. 1, the seven water chambers 23 corresponding to the central apron 34 divided into three are each in communication with a water source through a water supply pipe 39. An amount of water 32 corresponding to full opening is supplied. In addition, in the two water chambers 23 on the inner side in the plate width direction among the water chambers 23 corresponding to the aprons 34 on both sides, since the plunger 45 of the flow rate adjustment valve 41 is not in contact with the strikers 49 and 50, Each is fully open (100%), from which water 32 is supplied to the steel sheet 13.

Of the water chambers 23 corresponding to the aprons 34 on both sides in the plate width direction, in each one of the water chambers 23 on the outer side, the plunger 45 of the flow rate adjustment valve 41 contacts the sewage plane 55 of each striker 49, 50. The opening degree is 50%, and about half of the water 32 in the fully opened state is supplied to the steel plate 13 from here. In each of the two water chambers 23 on the outer side, the plunger 45 of the flow rate adjustment valve 41 is in contact with the upper horizontal surface 53 of each striker 49, 50 and is fully closed (0%). Supply of water 32 to is stopped.

Further, in each of the two outer water chambers 23 that are separated from the strikers 49 and 50, the plunger 45 of the flow rate adjustment valve 41 is not in contact with the strikers 49 and 50, so that the water is fully opened (100%). 32 is supplied.
In this way, by using the direct-acting flow rate adjustment valve 41, the water amount distribution in the plate width direction of the steel plate 13 is changed to a region other than the central portion in the plate width direction of the steel plate 13, for example, the water amount at both ends of the steel plate 13. In the inner side and the outer side from both ends of the diaphragm and the steel plate 13, the above-described distribution of supplying a constant water amount can be achieved. Thereby, since the total water amount applied to the steel plate 13 can be made constant regardless of the plate width of the steel plate 13, it is not necessary to use a control valve for adjusting the total water amount, and the amount of capital investment can be reduced.
In addition, it is also possible to stop water supply outside the vicinity of both ends of the steel plate 13 by further increasing the length of the striker upper water plane 53.

Next, a usage method and an operation (or operation) of the upper spray unit 14 of the steel sheet cooling facility 10 according to the first embodiment of the present invention will be described with reference to FIG.
First, as shown in FIG. 1, the three aprons 34 that are in contact with the bottom portions 29 of the seven water chambers 23 and are fixed integrally to the respective casing divided bodies 18 a are attached in advance to the vertical plate of the housing 17. Removably fixed to the lower ends of 19 and 20 with screws 36. Each water nozzle 31 is detachably attached to the bottom 29 of the casing 18 by a screw fastening mechanism.

Next, the high-temperature steel plate 13 conveyed while being sandwiched between the sewage draining roll 11 and the upper draining roll 12 is cooled.
In this case, as shown in FIG. 1, the position of each striker 49, 50 in the plate width direction is adjusted according to the plate width of the steel plate 13, and the operation of each flow rate adjustment valve 41 is controlled. Each striker 49, 50 stops the supply of water to the inner side and the outer side along the plate width direction around the both ends in the plate width direction of the steel plate 13, for example, to an area of 20 cm or more and 50 cm or less (water amount 0% zone). Further, the water amount is further moved from the 0% water zone to the position along the width direction of the steel plate 13 toward the inside (for example, the region of 20 cm to 50 cm) (the water amount 50% zone), and the supplied water amount is controlled. In addition, since the flow rate adjustment valve 41 is not used for each water chamber 23 located in the plate width direction center part of the steel plate 13, the supplied water amount is not controlled, that is, it is always supplied in a predetermined fixed amount. to continue. However, the amount of supplied water can be controlled with higher accuracy by using the flow rate adjusting valve 41 in each water chamber 23 located in the central portion of the steel plate 13 in the plate width direction.
Thereby, the area | region except the plate width direction center part of the steel plate 13, ie, the cooling rate of the plate width direction both sides of the steel plate 13, is controllable.

When the water nozzle 31 is replaced, each apron 34 having an opening 37 into which the tip of the water nozzle 31 is inserted is removed from the housing 17 together with the casing divided body 18a including the seven water chambers 23. After removing the water nozzle 31 to be replaced, which is screwed to the bottom 29 of the casing 18 (casing division 18a), and attaching a new water nozzle 31 to the bottom 29 of the casing 18 (casing division 18a), each apron 34 is attached to the housing 17 together with the casing divided body 18a. Moreover, the casing division body 18a which has the seven new water chambers 23 which attached the new water nozzle 31 in advance can also be replaced | exchanged for an old thing.
In this way, the apron is integrally connected to the casing by screw fastening, and is further detachably attached to the housing by a plurality of screws. Therefore, the water nozzle is screwed to the casing by removing the apron together with the casing. Maintenance (replacement and replacement) is extremely easy.

Then, the upper side spray unit 60 of the cooling equipment of the steel plate which concerns on the 2nd Embodiment of this invention shown in FIG. 2 is demonstrated. Since this upper spray unit 60 differs only in the configuration of the flow rate adjustment valve of the upper spray unit 14 of the steel sheet cooling facility 10 according to the first embodiment of the present invention, the same number is assigned to the same member. A detailed description will be omitted.

As shown in FIGS. 5 and 6, the rotary flow rate adjusting valve 61 includes a conventionally known ball-shaped valve body (ball) 62, and this valve body 62 is provided on the upper portion of the housing 17. The cooling water pipe 63 communicating with the water supply port 16 is provided at a connection portion between each water supply pipe 64 branched from the water supply header pipe 38.
The valve body 62 is connected to a drive shaft 65 that rotates the valve body 62 so as to be able to rotate. The drive shaft 65 is connected to a rotary cam 66 that has an egg shape when viewed from the front. The drive shaft 65 is provided at an eccentric position (wider side) of the rotary cam 66, so that in a free state, the reduced width portion of the rotary cam 66 is positioned below and the flow rate adjustment valve 61 is fully closed. (0%).

As shown in FIG. 6, the rotating cam 66 is rotated by a striker 67 that moves along the plate width direction, and can be adjusted from a fully open state to a fully closed state. The upper surface of the striker 67 is in contact with the peripheral surface 68 except for the upper end portion of the rotary cam 66, and the horizontal portion is formed in multiple stages (four stages in FIG. 6) in the sheet width direction. The position is adjusted. A rotation reset member 69 for reliably resetting the rotation angle of the rotary cam 66 to the initial state (fully closed state) is provided at the end of the portion where the height position of the striker 67 is lowest.
Thus, by forming the height position of the striker 67 in multiple stages, the opening degree of the flow regulating valve 61 can be adjusted, and the amount of water can be changed in multiple stages.

As shown in FIG. 6, by disposing the striker 67, the flow rate adjustment valve on the outer side in the plate width direction where the lowermost horizontal portion 70 of the striker 67 is in contact with the lower end position of the peripheral surface 68 of the rotating cam 66 in the free state. 61 is in a fully closed state (opening degree 0%), the flow regulating valve 61 in contact with the second horizontal portion 71 is opened 40%, and the flow regulating valve 61 in contact with the third horizontal portion 72 is opened 60%. The flow regulating valve 61 on the inner side in the plate width direction in contact with the uppermost horizontal portion 73 is fully opened (opening degree: 100%).

Accordingly, the striker 67 extends from the state in which the first horizontal portion 70 contacts only the flow rate adjusting valve 61 arranged in the innermost side in the plate width direction in FIG. 6 to the position in the state shown in FIG. In the process of moving to the outside, the innermost flow rate adjusting valve 61 is sequentially rotated by the horizontal portions 71 to 73 in the uppermost stage from the second stage to the fully opened state. At this time, the second flow rate adjustment valve 61 from the inside is sequentially rotated by the horizontal portions 70 to 72 from the first stage to the third stage so that the opening degree is 60%, and the third flow rate adjustment valve 61 from the inside is one stage. It is rotated by the horizontal parts 70 and 71 of the second stage and the second stage, and the opening degree is 40%.
In this way, the striker 67 moves toward the outer side in the plate width direction of the steel plate, and the respective flow rate adjustment valves 61 that have been closed are sequentially opened, so that the striker 67 is changed according to the plate width of the steel plate. By making it move, the water supply of the outer side of the board width direction both ends of a steel plate can be stopped.

As shown in FIGS. 5 and 6, a nut member 74 is attached to the lower portion of the striker 67. The female screw formed on the nut member 74 is screwed to the male screw formed on the screw shaft 75 driven by an electric motor (not shown).
With this configuration, the striker 67 can be advanced and retracted in the plate width direction via the nut member 74 by rotating the screw shaft 75 by driving the electric motor.
In this way, by using the rotary flow rate adjustment valve 61, water supply outside the steel plate can be stopped, water supply power can be reduced, and energy can be saved. It should be noted that by changing the structure of the striker, it is possible to perform water injection control similar to the case where the above-described direct acting flow rate adjustment valve 41 is used.

Instead of the upper spray unit 14 described above, another upper spray unit 76 can be used as shown in FIG. This upper spray unit 76 cools the steel plate 13 by combining water 32 and air 77. In addition, about the component which has a function similar to the above-mentioned upper side spray unit 14, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

The upper spray unit 76 includes a box-shaped housing 80 having an air supply port 78 and a water supply port 79, and a casing 81 that is detachably accommodated in the housing 80.
The housing 80 has a pair of rectangular vertical plates 82 and 83 that are vertically arranged opposite to each other and spaced in parallel with the conveying direction of the steel plate 13, and a vertical intermediate position between the vertical plates 82 and 83. And a rectangular horizontal plate 84 that is detachably fixed via bolts 21.

The casing 81 communicates with the air supply port 78 and is divided into a plurality of air chambers 85 divided in the plate width direction of the steel plate 13 in the upper stage, and communicated with the water supply port 79 and divided into a plurality of pieces in the plate width direction of the steel plate 13. The water chamber 86 is arranged in the lower stage, and the air chamber 85 and the water chamber 86 are formed in two stages. The air chamber 85 and the water chamber 86 do not have to correspond one-to-one. For example, a plurality of water chambers 86 can correspond to one air chamber 85. Here, the ceiling portion 87 of the casing 81 is disposed in contact with the lower surface 88 of the horizontal plate 84 of the housing 80.
Each of the water chambers 86 is formed by providing rectangular partition plates 93 that are in contact with the inner surfaces of the ceiling portion 89, both side portions 90 and 91, and the bottom portion 92 at predetermined intervals in the plate width direction. Yes. The partition plate 93 is detachably attached to the ceiling portion 89 via a bolt (not shown).
Here, similarly to the water chamber 86, the air chamber 85 is also formed with a partition plate disposed therein and divided into a plurality in the plate width direction of the steel plate 13.

A downstream end portion of an air communication pipe 94 communicating with an air supply port 78 provided in the horizontal plate 84 of the housing 80 is connected to the ceiling portion 87 of the casing 81, that is, the ceiling portion of each air chamber 85. A downstream end of a water communication pipe 95 communicating with a water supply port 79 provided in the horizontal plate 84 of the housing 80 is connected to the ceiling portion 89 of the chamber 86. The upstream end of the air communication pipe 94 is connected to an air source such as a compressor, and the upstream end of the water communication pipe 95 is connected to a water source such as a water supply pump.
Here, each water communication pipe 95 is provided so as to penetrate the ceiling portion of the air chamber 85 and the ceiling portion 89 of the water chamber 86. The above-mentioned direct acting flow rate adjustment valve 41 or rotary flow rate adjustment valve 61 is connected to the upstream side of the water communication pipe 95, and the flow rate adjustment valves 41, 61 are connected via the water supply pipes 40, 64. It is connected to the header pipe 38 for water supply.
The air communication pipe 94 is connected to an air header pipe (not shown).

In the air chamber 85 and the water chamber 86, a plurality of air-water nozzles 97 are provided with gaps.
Each air-water nozzle 97 has an air supply hole 98 communicating with the air chamber 85 at its upper end, and a water supply hole 99 communicating with the water chamber 86 at an intermediate position thereof. It can be directly connected to. The upper part of the air-water nozzle 97 is attached and sealed to the ceiling part 89 of each water chamber 86 via an O-ring (not shown).
With this configuration, the water 32 supplied to each water chamber 86 is being stirred in the water / water nozzle 97 together with the air 77 supplied from the air chamber 85 through the water supply hole 99 of the water / water nozzle 97. A fine gas-liquid mixed cooling medium (gas water) 100 is produced by mixing. And since this cooling medium 100 is sprayed on the steel plate 13 from the jet outlet of the front-end | tip of the air-water nozzle 97, the air-water nozzle 97 exhibits larger cooling capacity (about 2 times) than the water nozzle 31 mentioned above. Can do.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, the case where the steel sheet cooling equipment and the steel sheet cooling method of the present invention are configured by combining some or all of the above-described embodiments and modifications are also included in the scope of the present invention.
In the above-described embodiment, the case where the upper spray unit is provided with the flow rate adjusting valve has been described. However, the lower spray unit may be provided with a flow rate adjusting valve, or only the lower spray unit may be provided with the flow rate adjusting valve. Is also possible.

It is typical explanatory drawing of the upper side spray unit used for the cooling equipment of the steel plate which concerns on the 1st Embodiment of this invention. It is a typical side view of the cooling equipment of the steel plate. It is a principal part enlarged view of the upper side spray unit used for the cooling equipment of the steel plate. It is explanatory drawing which shows the operating state of the flow regulating valve of the upper spray unit. It is a principal part enlarged view of the upper side spray unit used for the cooling equipment of the steel plate which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the operating state of the flow regulating valve of the upper spray unit. It is a principal part enlarged view of the upper side spray unit which concerns on a modification.

Explanation of symbols

10: Steel sheet cooling equipment, 11: Sewage draining roll, 12: Upper draining roll, 13: Steel sheet, 14: Upper spray unit, 15: Lower spray unit, 16: Water supply port, 17: Housing, 18: Casing, 18a: Divided casing, 19, 20: Vertical plate, 21: Bolt, 22: Horizontal plate, 23: Water chamber, 24: Ceiling, 25: Cooling water pipe, 26: Lower surface, 27, 28: Side, 29: Bottom part, 30: partition plate, 31: water nozzle, 32: water, 33: supply port, 34: apron, 35, 36: screw, 37: opening, 38: header pipe for water supply, 39, 40: water supply pipe, 41: Flow control valve, 42: flow path, 43: upper surface, 44: valve block, 45: plunger, 46: water supply path, 47: bracket, 48: coil spring, 49, 50: striker, 51: spherical surface, 5 : Large inclined surface, 53: upper horizontal surface, 54: upper and lower inclined surface, 55: lower horizontal surface, 56: lower small inclined surface, 57: mounting bracket, 58: nut member, 59: screw shaft, 60: upper spray unit, 61: Flow rate adjusting valve, 62: Valve body, 63: Cooling water pipe, 64: Water supply pipe, 65: Drive shaft, 66: Rotating cam, 67: Striker, 68: Circumferential surface, 69: Rotation reset member, 70-73: Horizontal portion, 74: nut member, 75: screw shaft, 76: upper spray unit, 77: air, 78: air supply port, 79: water supply port, 80: housing, 81: casing, 82, 83: vertical plate, 84: Horizontal plate, 85: Air chamber, 86: Water chamber, 87: Ceiling, 88: Lower surface, 89: Ceiling, 90, 91: Side, 92: Bottom, 93: Partition plate, 94: Air communication pipe , 95: Water communication pipe, 9 : Air-water nozzle, 98: air supply hole, 99: water supply hole, 100: cooling medium

Claims (7)

A plurality of sewage draining rolls arranged side by side, an upper draining roll disposed so as to be movable up and down above the sewage draining roll, and each of the sewage draining rolls disposed between the sewage draining roll and the upper draining roll adjacent to each other. In the steel sheet cooling equipment having a plurality of upper and lower spray units for cooling the steel sheet in a high temperature state conveyed while being sandwiched between the roll and the upper draining roll,
One or both of the upper and lower spray units are
A box-shaped housing with a water supply port connected to a water source;
A casing in which a water chamber is formed that is removably accommodated in the housing and is divided into a plurality of portions in the plate width direction of the steel plate in communication with the water supply port.
A plurality of water nozzles coupled to the water chamber, each disposed with a gap therebetween;
A flow rate adjusting valve that controls the amount of water supplied to the water chamber provided at least in a region excluding the central portion in the plate width direction of the steel plate;
A steel plate cooling facility comprising: a striker that moves in the plate width direction and is capable of adjusting an opening degree of each flow rate adjustment valve. A plurality of sewage draining rolls arranged side by side, an upper draining roll disposed so as to be movable up and down above the sewage draining roll, and each of the sewage draining rolls disposed between the sewage draining roll and the upper draining roll adjacent to each other. In the steel sheet cooling equipment having a plurality of upper and lower spray units for cooling the steel sheet in a high temperature state conveyed while being sandwiched between the roll and the upper draining roll,
One or both of the upper and lower spray units are
A box-shaped housing having an air supply port and a water supply port respectively connected to an air source and a water source;
A casing that is detachably housed in the housing, and that forms a water chamber communicating with the water supply port and an air chamber communicating with the air supply port in two upper and lower stages;
A plurality of air-water nozzles directly connected to the water chamber and the air chamber, each disposed with a gap;
A flow rate adjusting valve that controls the amount of water supplied to the water chamber provided at least in a region excluding the central portion in the plate width direction of the steel plate;
A steel plate cooling facility comprising: a striker that moves in the plate width direction and is capable of adjusting an opening degree of each flow rate adjustment valve. 3. The steel sheet cooling equipment according to claim 1, wherein the flow rate adjustment valve is a direct-acting flow rate adjustment valve having a plunger that advances and retreats, and the striker is brought into contact with the plunger. And a steel sheet cooling facility characterized by restricting the amount of water to the water chamber. 3. The steel sheet cooling apparatus according to claim 1, wherein the flow rate adjustment valve is a rotary flow rate adjustment valve having a rotating ball, and the striker is mounted on a rotating cam provided on the ball. The steel sheet cooling equipment is characterized in that the amount of water to the water chamber is restricted by contacting the water chamber. 5. The steel sheet cooling equipment according to claim 3, wherein the striker is formed in a plurality of stages, and the amount of water is changed in a plurality of stages. A steel plate that cools the steel sheet by injecting water through the water nozzle or water through the water nozzle onto the upper and lower surfaces of the high temperature steel sheet that is conveyed while being sandwiched between the sewage water draining roll and the water draining roll. In the cooling method,
The water amount distribution in the plate width direction of the steel sheet is a method of cooling a steel plate, wherein the water amount is reduced in a region excluding the central portion in the plate width direction of the steel plate, and a constant amount of water is supplied in other regions. The method for cooling a steel sheet according to claim 6, wherein water supply is stopped further outside both ends in the sheet width direction of the steel sheet.

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