JPH0143190Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spray nozzle device for treating water accumulated on the upper surface of a steel plate, and further includes:
To effectively treat the cooling water that remains on the steel plate to be cooled before and after a water cooling device for steel plates, etc., and to maintain a water injection nozzle that forms a continuous fan-shaped water film at a constant interval from the steel plate to be cooled. , relates to a colander spray nozzle device.

In recent years, research has been actively conducted on so-called controlled cooling methods, in which steel sheets with excellent material properties are produced by accelerated cooling of steel sheets after controlled rolling on-line. This involves injecting pressurized water onto the front and back surfaces of the steel plate immediately after rolling.
Water cooling is performed at a predetermined cooling rate to around 500°C. After colliding with the steel plate, the cooling water injected onto the upper surface of the steel plate flows on the surface of the steel plate in the width direction or longitudinal direction of the steel plate, and falls downward from the edge of the steel plate. This causes the following problems.

(1) On the inlet side of the cooling system, the cooling water that remains or flows on the top surface of the steel plate flows out upstream from the cooling start position, which not only lowers the steel plate temperature at the cooling start position, but also makes it impossible to perform the prescribed heat treatment. , the temperature of the steel plate before the cooling start position becomes non-uniform, causing distortion of the steel plate or unevenness in the material due to uneven cooling, resulting in a serious problem.

(2) Similarly, on the outlet side of the cooling system, the cooling water that remains on the top surface of the steel plate flows downstream from the cooling end position, so the steel plate is cooled more than necessary, and the desired material quality may not be obtained. This causes problems such as uneven cooling and deformation of the steel plate. In other words, when a high-temperature steel plate is rapidly cooled to near room temperature, such as during quenching, even if cooling water remains on the top surface of the steel plate after passing through the cooling device, there is little chance of such deformation or material defects occurring. , for example, the steel plate temperature at the end of cooling is 200 to 300℃.
If this is the case, there is a problem.

In response to such problems, the present inventors first
A spray nozzle 1 that spouts a continuous fan-shaped water film 2 from a slit-shaped opening as shown in FIG.
is placed above the steel plate conveying table 3 and above the center of the steel plate 4 in the width direction, so that it can be raised and lowered, and the fan-shaped water film 2 is moved in the advancing direction of the steel plate 4 or in the opposite direction. A draining spray nozzle device has been developed and is currently under application, which is characterized by spraying at an angle of 30° to 10° with respect to the horizontal surface, that is, the surface of a steel plate. The present invention relates to an improvement of the above-mentioned draining spray nozzle device, in which when the draining spray nozzle is moved up and down above the steel plate, the tip of the nozzle may come into contact with the surface of the steel plate or the end of the steel plate, causing damage to the spray nozzle. Alternatively, it has been devised through repeated improvements in order to avoid the occurrence of scratches, scratches, nicks, etc. on the surface of the steel plate. That is, normally, when draining water, the injection nozzle 1 is at the lowest position, but if the steel plate 4 moving below the injection nozzle 1 is flat, the pass line of the steel plate conveying table 3 is connected from the tip of the injection nozzle 1. If the separation distance H between the steel plate 4 and the steel plate 4 is set to be equal to or greater than the maximum processing thickness of the steel plate 4, the tip of the injection nozzle 1 and the steel plate 4 may come into contact, causing damage to the injection nozzle 1, the water cannon 5, etc., or the steel plate 4.
Although no scratches or the like occur on the surface of the steel plate 4, in reality, the steel plate 4 is warped or strained during rolling or deformed during cooling, resulting in the above-mentioned problems. Moreover, this may cause the entire rolling line to stop, and immediate countermeasures are strongly desired.

The present invention provides a means to solve the above-mentioned problems extremely easily and effectively.

Its characteristic structure is an injection nozzle that is attached to the tip and forms a continuous fan-shaped water film, and a hose that is connected to a pressurized water source and has a valve that adjusts the amount of water that is ejected. a water cannon that supplies water, a support rod at the other end that is supported by a base, is connected to the water cannon, and has a branch lever, and is connected to the branch lever and provides vertical rotation to the water cannon. The spray nozzle device is characterized by comprising a drive device and a wheel that is attached to the tip side of the injection nozzle and is rotatable in contact with the upper surface of the steel plate.

In addition, in order to prevent the tip of the injection nozzle from coming into contact with the steel plate, the tip of the injection nozzle is equipped with a wheel that can rotate in contact with the steel plate and always maintains a constant distance from the steel plate surface. The spray nozzle is vertically movable for stable water removal.

FIGS. 2a and 2b show a plan view and a side view of the present invention, showing an embodiment of the structure of a draining spray nozzle device.

This figure shows an example in which a spray nozzle device 20 according to the present invention is attached to the outlet side of a cooling device 21 to remove accumulated water 19 on the upper surface of a steel plate 4 after cooling.

The spray nozzle device 20 has one end of the water cannon 5 connected to the support rod 7, and its base end connected to the base 9 with the pin 1.
The tip of the piston rod 6b of the cylinder 6a of the drive device 6 is attached to the tip of a branching lever 8 which is rotatably supported in the vertical direction at 0a and is integrally provided in a branched manner with the support rod 7 supported by this pin 10a. When the piston of the drive device 6 is moved back and forth based on a command from a command device (not shown), i.e., left and right in the figure, it tilts around the pin 10b that supports the center of the drive device and branches. The lever 8 is rotated around the pin 10a of the base 9, and the water cannon 5, which is similarly fixed to the support rod 7, is swung up in an arc around the pin 10a and rotated vertically by an angle θ.

The spray nozzle 1 attached to the distal end side of the water spray tube 5 can be raised and lowered to a height Hm above the center of the conveyance table 3. Further, a flexible hose 15 for supplying pressurized water 18 is connected to the base end side of the water discharge tube 5, and the other end is connected to a pressurized water supply pipe 17, and a control valve for adjusting the amount of pressurized water supplied is connected to the other end of the flexible hose 15. 16 is installed.

A spray nozzle 1 having a slit-shaped opening for spray-forming a continuous fan-shaped water film 2 on the upper surface of the steel plate is attached to the tip of the water tube 5.

An axle bracket 11 is fixed to the tip side of the main body of the injection nozzle 1, and this bracket 11 has a wheel 12 that can rotate in contact with the surface of a steel plate, a wheel 13 that supports this wheel 12, and a wheel 12. A stopper 14 that guides and locks onto the axle 13 is provided.

It is preferable that the wheels 12 attached to the tip side of the injection nozzle 1 are provided so as to project slightly from the tip of the main body of the injection nozzle 1 in the conveyance direction of the steel plate 4, and that the wheels 12 are large wheels. Next, the operation of removing the accumulated water 19 on the surface of the steel plate 4 using the present spray nozzle device 20 will be explained in detail based on FIGS. 2a and 2b.

At the same time as the tip of the steel plate 4 moving on the conveyance table 3 passes below the spray nozzle 1, the drive device 6 of the spray nozzle device 20 is actuated by a command from a command device (not shown) to reach the right side of the drawing, that is, the pull side stroke end. After moving the injection nozzle 1 to the position where the injection nozzle 1 is, the injection nozzle 1 is lowered to a height Hm above the upper surface of the steel plate 4.

At this time, the grounding end of the wheel 12 is set and adjusted so as to be equal to or greater than the maximum processing thickness of the steel plate 4 passing on the pass lines P and L of the conveyance table 3. In this embodiment, the distance from the pass lines P and L to the ground contact edge of the wheel 12 is 100 mm.

Therefore, the steel plate 4 is flat and the steel plate thickness is 100 mm.
When the distance is less than 1, the wheels 12 and the steel plate 4 do not come into contact with each other.

At the same time that the injection nozzle 1 and the water cannon 5 descend and reach the height Hm, the drive device of the water supply pump (not shown) is activated, and the pressurized water 18 that has filled the pressurized water supply pipe 17 is pumped through the flexible hose 15 and the control valve. 16 and the base end side of the water cannon 5, and the water cannon 5
A powerful and continuous fan-shaped water film 2 is ejected from the injection nozzle 1 attached to the tip side of the steel plate 4, and the adhering water and accumulated water 19 on the surface of the steel plate 4 or the cooling device 2 are
The water flowing out from the steel plate 1 is dammed up and pushed toward the jetting direction of the water film 2, and at the same time, it is discharged from the edge of the steel plate to the outside to remove the water on the steel plate 4 and drain the water.

At this time, the operating source of the drive device 6 that rotates the spray nozzle device 20 is stopped, and the next operation to the left, that is, the piston rod 6b of the drive device 6 protrudes forward and is integrally installed on the support rod 7. The branch lever 8 is connected to the water cannon 5 with the pin 10a of the base 9 as the center.
It is arranged to rotate upward in an arc.

If the steel plate 4 is distorted or warped during draining, the surface of the steel plate will come into contact with the wheel 12 attached to the tip of the injection nozzle 1, causing the wheel 12 to rotate due to the running steel plate 4 and cause the wheel to warp. 12, the main body of the injection nozzle 1 supporting the same, and the water spray tube 5 integrated therewith are pushed upward.

In this way, once the steel plate 4 is no longer deformed, it descends again under its own weight and is located at a height Hm above the pass lines P and L of the conveyance table 3. In this embodiment, the vertical rotation of the water cannon 5 is shown as being in a plane perpendicular to the steel plate conveying direction, but if it is made to be able to freely rotate in a plane of more than 90 degrees at right angles, It is possible to reduce the impact force when the tip of the steel plate 4 hits or collides.

As described above, in the present invention, the injection nozzle 1 can move up and down freely following the large amount of deformation of the steel plate 4, and at this time, the rotatable wheels 12 come into contact with the surface of the steel plate. Problems such as surface scratches are no longer caused, and the distance between the steel plate surface and the injection nozzle can always be maintained constant, allowing water to drain by removing accumulated water on the top surface of the steel plate in a stable condition. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing the draining spray nozzle device of the present invention before improvement. FIGS. 2a and 2b are a plan view and a side view of an embodiment of the spray nozzle device according to the present invention. Explanation of symbols, 1: Spray nozzle, 2: Water film, 3:
Transport table, 4: steel plate, 5: water cannon, 6: drive device, 6a: cylinder, 6b: piston rod,
7: Support rod, 8: Branch lever, 9: Base, 10:
Pin, 11: Wheel bracket, 12: Wheel, 1
3: Axle, 14: Stopper, 15: Flexible hose, 16: Control valve, 17: Pressurized water supply piping, 1
8: Pressurized water, 19: Remaining water, 20: Spray nozzle device, 21: Cooling device.

Claims (1)

[Scope of utility model registration request] an injection nozzle that is attached to its tip and that spray-forms a continuous fan-shaped water film; a water cannon that is connected to a pressurized water source and has a valve that adjusts the amount of water that is ejected, and that is connected to a hose that supplies pressurized water to the injection nozzle; The other end includes a support rod supported by a base, connected to the water cannon, and provided with a branching lever, a drive device connected to the branching lever for vertically rotating the water cannon, and the injection nozzle. A spray nozzle device comprising: a wheel that is attached to the tip side of the wheel and is rotatable in contact with the upper surface of a steel plate.