JP3257478B2 - Drainer sprayer on steel plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a draining sprayer used for removing cooling water remaining on a rolled steel sheet in a rolling process of a rolled steel sheet, particularly in a control cooling process of hot plate rolling. Things.

[0002]

2. Description of the Related Art Conventionally, in a rolling process of a rolled steel sheet, cooling water has been used for cooling equipment or cooling the rolled steel sheet. If the rolled steel sheet stays on the steel sheet, the temperature distribution of the rolled steel sheet becomes non-uniform, resulting in poor quality such as poor mechanical test values and poor shape.

As a means for removing the cooling water remaining on the steel plate, a method of blowing off using high-pressure water is widely used, and as shown in FIGS. 10 (a) and 10 (b), a roller table 2 is used. Drain side spraying device 51 on the side of rolled steel plate (thick plate or hot strip) 1 conveyed above
Alternatively, 52 is installed, and high-pressure water is sprayed on the steel sheet in a direction orthogonal to the line (steel sheet width direction).
As shown in FIG. 0 (c), there is a method of installing a drainage gate type spraying device 53 above the roller table 2 and spraying it in the line direction (longitudinal direction of the steel plate).
09, JP-A-7-9023).

However, as shown in FIGS. 10 (a) and 10 (b), in the method in which high-pressure water is blown from the line side in a direction perpendicular to the line, high-pressure water is jetted from above in the lateral direction, so Spray water hits the surface of the rolled steel sheet, resulting in supercooling of the side end surface of the steel sheet. ,
There is a problem that the temperature distribution in the width direction of the steel sheet becomes non-uniform. In particular, when an extremely large amount of water is likely to remain on the steel sheet, such as a steel sheet after controlled cooling, there is a problem that drainage becomes extremely poor.

[0005] The former partial cooling of the side end face can be solved by shielding the spray water on the side end face of the steel sheet with a shielding plate as disclosed in Japanese Patent Application Laid-Open No. 7-9023. However, because of the latter problem, it is not suitable for a drain device for a control cooling device.

In order to solve the problem, Japanese Patent Application Laid-Open No. 60-14 / 1985
No. 9431 discloses a technique in which a spray nozzle device capable of strongly ejecting and forming a fan-shaped continuous water film is installed to be able to ascend and descend above a transfer table, and a semi-disc-shaped water film is formed on a steel plate. According to this, according to this, high pressure water does not hit the side end surface of the steel sheet, so that the side end is not unevenly cooled, and since the spray nozzle is located immediately above the center of the steel sheet, the blowing force is strong. Therefore, the draining ability immediately below the nozzle is increased. However, the greater the width of the steel sheet, the weaker the drainage effect, and there is a drawback that the predetermined drainage ability cannot be obtained.

In the method of spraying high-pressure water in a line direction from a plurality of spray nozzles of the gutter type spray apparatus shown in FIG. 10 (c), there is a problem that drainage between the nozzles is poor and stagnant water remains. there were. If the retained water remains, the temperature distribution of the steel sheet becomes uneven, and quality defects such as mechanical test value defects and shape defects occur.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain extremely good drainage performance over the entire width direction of a steel sheet without supercooling the steel sheet side end face. It is an object of the present invention to provide a water draining spray device on a steel plate capable of surely and stably draining water even when an extremely large amount of water stays on the steel plate such as a steel plate after controlled cooling.

[0009]

SUMMARY OF THE INVENTION A first draining spray apparatus of the present invention is a draining spray apparatus used for removing cooling water staying on a steel sheet conveyed by a line table. As shown in the drawing, a water supply header 12 is provided above a line table (roller table) 2 so as to cross the line table, and high-pressure water 15 is directed to the water supply header 12 from above the line table toward the outside in a direction orthogonal to the line. The side spray nozzles 13 for spraying on the steel plate 1 are spaced apart in the longitudinal direction of the water supply header.
And are disposed so as to face each other. The side spray nozzles 13 may be arranged, for example, as a pair facing each other at intervals in the longitudinal direction of the water supply header 12, and may be provided on one side of the water supply header 12 as shown in the drawing.
It may be provided on both sides of the water supply header 12. Also,
A single side spray nozzle 13 or a pair of side spray nozzles 13 may be arranged on each of a plurality of water supply headers 12 arranged in parallel.

A second water draining sprayer according to the present invention is a water draining sprayer used for removing cooling water staying on a steel sheet conveyed by a line table, as shown in FIG. A water supply header 12 is provided above (roller table) 2 so as to cross the line table.
5 is sprayed on the steel plate 1 from the line table toward the outside in the direction orthogonal to the line.
Are arranged so as to face each other at intervals in the longitudinal direction of the water supply header , and the high-pressure water 15 is directed from the line table to the stagnant water 4 side in the line direction (for example, the outlet side of the control cooling device). When installed on the inlet side of the controlled cooling device, the counter spray nozzles 14 for spraying on the steel sheet 1 are arranged in the opposite direction of the steel sheet. It is characterized by having been established.

A third water draining spray device according to the present invention is a water draining spray device used for removing cooling water staying on a steel sheet conveyed by a line table, as shown in FIG. A pair of water supply headers 12 are provided above the (roller table) 2 so as to cross the line table, and high-pressure water 15 is applied to one of the water supply headers 12 on the anti-stagnant water side from the line table to the outside in the direction orthogonal to the line. The side spray nozzle 13 which sprays on the steel plate 1 toward the water feed header is spaced in the longitudinal direction.
It arranged so as to Oite face, the other of the water supply header 12 residence water side, the counter spray nozzles 14 for injecting on the steel plate 1 toward the high-pressure water 15 from the line table in the line direction of the accumulated water 4 side It is characterized in that a plurality are arranged.

In the first to third draining spray devices described above, as shown in FIG. 4, the side spray nozzle 13 and the counter spray nozzle 14 have a collision angle of the center of the high-pressure water 15 on the steel plate 1 in the vertical direction. , Α, β <45
° and the collision angle of the high-pressure water against the steel plate is made acute to ensure drainage performance. In addition, side spray nozzle 1
In the case of 3, the distance L between the collision point of the high-pressure water center on the steel plate 1 and the line center is L> 0, and the cooling water is prevented from hitting the front end surface of the steel plate. Is not partially cooled. Further, the pair of side spray nozzles 13 arranged oppositely shifts the position in the line direction or adjusts the horizontal spray angle γ so that the high-pressure waters 15 do not interfere with each other (see FIG. 5).

In the above configuration, in the case of the side spray nozzle 13, since high-pressure water is sprayed outward from the line table in the width direction of the steel sheet, the spray water does not hit the side end face of the steel sheet, The uneven cooling of the end can be eliminated. In addition, since the distance between the nozzle and the steel plate is shorter than in the conventional line side, drainage can be performed with a strong blowing force, and drainage of a large amount of retained water in controlled cooling or the like can be performed. Furthermore, by arranging a pair of side spray nozzles 13 in opposition, half of the steel plate in the width direction can be drained with a strong spraying force, and extremely good drainage performance can be obtained over the entire steel plate width direction. A large amount of accumulated water can be drained.

Further, by combining the side spray nozzle 13 and the counter spray nozzle 14 as described above, it is possible to carry out draining twice with a strong spraying force having different spraying directions from the line, which is more excellent. Draining performance can be obtained, and draining of a very large amount of retained water over the entire surface of the steel plate becomes possible.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on one embodiment shown in the drawings. This is an example of applying to a controlled cooling in which a controlled rolled steel sheet is accelerated and cooled at a predetermined cooling rate by a controlled cooling device in a plate rolling, and a drainer provided with two types of spray nozzles in one water supply header. This is the case of a spray device. 2 and 4 show a schematic configuration of the draining spray device, and FIGS. 5 to 8 show a specific configuration.

2, 5 and 6, the drainer spray device 11 of the present invention is installed above the roller table 2 on the outlet side of the control cooling device 3, and mainly includes one water supply header 12 and a high pressure A pair of side spray nozzles 13 for spraying water 15 onto the rolled steel sheet 1 from the roller table 2 toward the outside in a direction orthogonal to the line, and high-pressure water 15 from the roller table 2 to the retained water 4 side in the line direction. It is composed of a number of counter spray nozzles 14 for spraying onto the rolled steel sheet 1 toward it. Water supply header 12
Is disposed above the roller table 2 so as to be parallel to a direction orthogonal to the line, and is installed so as to be able to move up and down by a lifting mechanism described later.

The pair of side spray nozzles 13 are located on both sides of the water supply header 12 opposite to the control cooling device 3 so as to be located above both ends in the width direction of the roller table 2 (both ends of the steel plate having the maximum width). Mounted on Each side spray nozzle 13 is piped such that the nozzle portion 13a at the tip is located below the water supply header 12 on the side of the non-control cooling device, and is disposed such that the nozzle portions 13a face each other. 15 is injected toward the outside in the opposite direction to the width direction of the steel sheet,
Can be sprayed substantially at the center in the width direction.

As shown in FIG. 4, a vertical directivity angle α of each nozzle portion 13a in the side spray nozzle 13 is shown.
Is set to α <45 °, and the collision angle of the high-pressure water 15 against the rolled steel sheet 1 is set to an acute angle to ensure drainage performance. Also,
The distance L between the center of the high-pressure water 15 colliding with the rolled steel sheet 1 and the line center is set so that L> 0 and the cooling water does not hit the end face of the steel sheet on the near side. The two end faces in the direction are not unevenly cooled. Further, as shown in FIG. 5 and FIG.
The horizontal angle of the line 3a from the line orthogonal direction is 0 °, and the horizontal angle of the other nozzle 13a is γ (for example, 15 °).
So that the high-pressure water 15 to be injected does not interfere with each other.

A large number of counter spray nozzles 14 are arranged on the side of the water supply header 12 on the side of the control cooling device 3 at intervals in the longitudinal direction of the water supply header. As shown in FIG. 4, each of the counter spray nozzles 14 has a nozzle portion 14 a at the tip end which is directed toward the control cooling device 3.
It is a counter spray that is configured to point upward and opposes the stagnant water 4 on the steel sheet that is traveling. The directivity angle β in the vertical direction of each nozzle portion 14a is set to β <45 ° similarly to the side nozzle portion 13a, and the collision angle of the high-pressure water 15 against the rolled steel plate 1 is set to an acute angle to ensure drainage performance. . As shown in FIGS. 5 and 6, each spray nozzle 14 has a longer central portion and a shorter length gradually toward both sides in the width direction of the steel plate, and flushes the retained water 4 on the steel plate to both side portions of the steel plate. Like that.

The lifting mechanism of the water supply header 2 is shown in FIGS.
As shown in FIG. That is, the water supply header 12 is formed to be sufficiently longer than the width of the roller table 2, the portal gantry 20 is installed across the roller table 2, the guide wheels 21 are provided at both ends of the water supply header 12, and the guide wheels 21 are provided. By being guided and supported by the columns of the gate-shaped gantry 20, it can be moved up and down freely. Such a water supply header 12 is connected to an air cylinder 22 as a driving device and a pair of V-shaped swing levers 23.
Is lifted and lowered at a predetermined stroke by a pair of hanging members 24 composed of turnbuckles.

The pair of swinging levers 23 have their bases rotatably fixed to the upper part of the beam of the portal gantry 20 via a rotating shaft.
The levers 23a on one side are connected to each other by a connecting member 25 to enable synchronous rotation, and the tip of the piston rod of the air cylinder 22 is connected to the lever 23a on one side of the one swing lever 23 via a pin. At the tip of the lever 23b on the other side of the pair of swing levers 23, the upper part of the hanging member 24 is attached via a pin, and the lower part of the hanging member 24 is
Attach it to the top of the device via a pin.

When the piston rod of the air cylinder 22 is expanded and contracted, the water supply header 12 is moved up and down via the swing lever 23 and the suspension member 24, and at the stroke end of the air cylinder 22, the water supply header 12 is moved relative to the rolled steel plate 1. A descending state in which the water supply header 12 is retracted upward is set. This rising state is caused by the fixing lever 23c of the swing lever 23 to which the air cylinder 22 is connected.
Is fixed to the fixing member 26 via a pin. The water supply header 12 is connected to a water supply pipe 27 having a swivel joint and capable of following up and down.

The drainer spray device having the above configuration operates as follows.

(1) When the controlled cooling is started by the controlled cooling device 3, the water supply header 12 that has been raised and retracted is lowered to a predetermined position, and spray injection is started. The high pressure water 15 from the multiple counter spray nozzles 14
As shown in (1), it is sprayed opposite to the accumulated water 4 on the rolled steel sheet 1 that is moving forward, and has a convex shape in the anti-movement direction in plan view, and pushes the accumulated water 4 to both sides of the steel sheet.
The high-pressure water 15 from the pair of side spray nozzles 13
Each of them is sprayed from the center of the rolled steel sheet 1 toward the end of the steel sheet on the opposite side to cover the entire width of the rolled steel sheet 1, and the remaining retained water is completely removed. By bringing the descending position of the water supply header 12 as close as possible, the collision force of water, that is, the drainage ability can be increased.

(2) When the steel sheet 1 passes, the spray injection is stopped and the water supply header 12 is raised. Also, when not using the draining spray device, keep it up and down to protect the device from heat. Furthermore, in the event that a large warp occurs in the steel plate 1, the water supply header 12 can be raised and retracted to prevent a collision.

[0026]

EXAMPLE A water drainage test was conducted under the conditions shown in FIG. 9 using the conventional (port-type spray device) and the present invention (the device shown in FIG. 2). As shown in the graph of FIG. 9, the temperature distribution in the width direction of the steel sheet could be made more uniform than before. Thereby, the shape and mechanical test characteristics of the steel sheet could be improved.

In the above description, the drainer spray device in which two types of spray nozzles 13 and 14 are provided in one water supply header 12 has been described. However, the present invention is not limited to this, and one water supply header 12 as shown in FIG. A pair of side spray nozzles 13 may be disposed opposite to each other, or a pair of water supply headers 12 may be provided with a side spray nozzle 13 and a counter spray nozzle 14 as shown in FIG. 3. An equivalent effect can be obtained. Although the above description has shown an example in which the drainer spray device of the present invention is installed on the outlet side of the control cooling device, it can be installed on the inlet side of the control cooling device, the inlet and outlet side of the rolling mill, and the inlet and outlet side of the straightening machine. It is. Also, an example in which the present invention is applied to a rolling process of thick plate rolling has been described. However, it is needless to say that the present invention can be applied to a process of hot strip (hot strip) or the like.

[0028]

As described above, according to the present invention, the water supply header is provided above the line table so as to cross the line table, and the high pressure water is directed to the water supply header from above the line table in the direction orthogonal to the line. A plurality of side spray nozzles for spraying on the steel plate, and a plurality of counter spray nozzles for spraying the high pressure water on the steel plate from the line table toward the stagnant water side in the line direction, The following effects can be obtained.

(1) Since high-pressure water is sprayed onto the steel sheet from the side spray nozzle on the line and the counter spray nozzle on the line, uneven cooling at the end of the steel sheet can be eliminated, and a strong spraying force over the entire surface of the steel sheet , And water remaining on the steel plate can be reliably and stably removed. Thereby, the temperature distribution of the steel sheet can be made uniform, and quality defects such as shape defects and mechanical test value defects can be prevented.

(2) It is possible to obtain extremely excellent drainage performance that cannot be obtained conventionally, and also to drain a large amount of retained water, and it can be applied to a drainage device of a control cooling device. It is possible to eliminate shape defects and mechanical test value defects in the above.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a first drainer spray device of the present invention.

FIG. 2 is a perspective view showing an example of a second drainer spray device of the present invention.

FIG. 3 is a perspective view showing an example of a third drainer spray device of the present invention.

4A is a front view showing a side spray nozzle of the present invention, and FIG. 4B is a side view showing a counter spray nozzle of the present invention.

FIG. 5 is a plan view showing a specific example of a second drainer spray device of the present invention.

6 is a specific example of a water supply header of the present invention, (a) is an overall view, (b) is a cross-sectional view showing a side spray nozzle portion,
(c) is a sectional view showing a counter spray nozzle portion.

FIG. 7 is a front view showing an elevating mechanism of the water supply header of the present invention.

FIG. 8 is a side view showing an elevating mechanism of the water supply header of the present invention.

FIG. 9 is a table comparing the drainage test between the conventional and the present invention.

FIG. 10 is a perspective view showing a conventional general drainer spray device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rolled steel plate 2 ... Roller table 3 ... Control cooling device 4 ... Retention water 11 ... Drain spray device 12 ... Water supply header 13 ... Side spray nozzle 13a ... Nozzle part 14 ... Counter spray nozzle 14a ... Nozzle part 15 ... High pressure water 20 ... Portal frame 21 ... Guide wheel 22 ... Air cylinder 23 ... Swing lever 24 ... Suspension member 25 ... Connecting member 26 ... Fixing member 27 ... Water supply pipe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-230809 (JP, A) JP-A-7-9223 (JP, A) JP-A-60-149731 (JP, A) JP-A-58-1983 177419 (JP, A) Japanese Utility Model 60-161462 (JP, U) Japanese Utility Model 63-85309 (JP, U) Japanese Utility Model Application Hei 5-65411 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 45/00-45/02 C21D 9/52 102 C21D 9/573 101 C21D 1/00

Claims (3)

(57) [Claims] In a water draining spray device used for removing cooling water staying on a steel sheet conveyed by a line table, a water supply header is provided above the line table so as to cross the line table. A side spray nozzle that sprays high-pressure water onto the steel plate from the line table to the outside in the direction perpendicular to the line is opposed to the header at an interval in the longitudinal direction of the water supply header
A sprayer for draining water on a steel plate, wherein the sprayer is arranged so as to perform a draining operation. 2. A water draining sprayer used for removing cooling water staying on a steel plate conveyed by a line table, a water supply header is provided above the line table so as to cross the line table. A side spray nozzle that sprays high-pressure water onto the steel plate from the line table to the outside in the direction perpendicular to the line is opposed to the header at an interval in the longitudinal direction of the water supply header
And a plurality of counter spray nozzles for spraying high-pressure water onto the steel plate from the line table toward the stagnant water side in the line direction on the steel plate. 3. A drainer sprayer used for removing cooling water staying on a steel sheet conveyed by a line table, wherein a pair of water supply headers are provided above the line table so as to cross the line table, Anti
On one of the water supply header residence water side, the water supply header longitudinal direction of the side spray nozzles for ejecting onto the steel sheet toward the outside in the direction perpendicular to the line-pressure water from the line table
Spaced direction and disposed opposite to the feed water header other <br/> side of staying water side, injects on to the steel plates toward the high-pressure water from the line table in the line direction of the residence waterside A drainer sprayer on a steel plate, comprising a plurality of counter spray nozzles.