JP5487646B2 - Drainer structure for reverse conveyance in hot-rolled slab descaling equipment - Google Patents

Description

  The present invention relates to a draining plate structure in a hot-rolled slab descaling apparatus.

  Scales are generated in the slab (hot slab) rolled in the hot rolling line in the cooling process after extraction in the heating furnace. A descaling device is installed to remove the scale, and a device that injects high-pressure water (descaling water) onto the slab and removes the scale with the pressure is well known. In this type of descaling device, in order to prevent the descaling water from splashing from the descaling hood, it is necessary to install a draining plate for draining water in contact with the surface of the slab.

  FIG. 5 shows an example of such a descaling apparatus, and with respect to the upper surface 1a of the slab 1 that is conveyed downstream on the roller table 2 toward a hot rolling mill (not shown). The upper descaling nozzle 11 that injects the descaling water obliquely from the upper side toward the upstream side, and the lower descaling water that injects the descaling water obliquely from the lower side to the upstream side, similarly to the lower surface 1b of the slab 1. And a draining plate 20 that drains descaling water sprayed from the upper descaling nozzle 11 in contact with the upper surface 1a of the slab 1 on the upstream side of the upper descaling nozzle 11. The water collecting tank 25 is provided for collecting the drained descaling water.

  Here, the draining plate 20 is attached to the draining plate main body 21, the tip of the draining plate main body 21, the draining plate tip rotating part 22 rotating in contact with the upper surface 1 a of the slab 1, and the draining plate 20 to the slab 1. And a turning support portion 24 that supports the turning shaft 23.

  And when the slab 1 has not passed, the draining board 20 is located in the vertical direction as shown by a broken line in FIG. 5, and the slab 1 passes downstream toward the hot rolling mill. At this time, as shown by a solid line in FIG. 5, the rotating shaft 23 is turned toward the downstream side with the turning shaft 23 as a fulcrum, and the draining plate tip rotating portion 22 contacts the upper surface 1 a of the slab 1.

  However, in such a conventional descaling apparatus, the draining plate 20 can only support one-way conveyance of the slab 1, and if the slab 1 is conveyed and reverse-conveyed for reverse rolling, the draining plate 20 is damaged by the slab 1. there's a possibility that.

  That is, when the slab 1 is conveyed only in one direction downstream toward the hot rolling mill, the draining plate 20 can be turned only from the vertical direction to the downstream side so that the vertical direction is directed to the upstream side. However, when the slab 1 is transported in reverse, when the slab 1 is transported downstream toward the hot rolling mill, as shown in FIG. The draining plate 20 can be swung from the vertical direction toward the downstream side, and when the slab 1 is conveyed upstream so as to be separated from the hot rolling mill, the draining plate 20 can be swung from the vertical direction toward the upstream side. It is necessary to do so. Therefore, the draining plate 20 can be swung not only from the vertical direction to the downstream side (upper descaling nozzle 11 side) but also from the vertical direction to the upstream side (opposite side of the upper descaling nozzle 11). Will be.

  As a result, the draining plate 20 turns toward the upstream side due to the pressure of the descaling water jetted from the upper descaling nozzle 11, and turns toward the upstream side as shown in FIG. The leading end of the slab 1 conveyed toward the downstream side collides with the draining plate 20 to be performed. Then, as shown in FIG.7 (b), the draining board 20 turns toward a downstream side. Due to the collision of the tip of the slab 1 with the draining plate 20, a large impact force is applied to the draining plate 20, and the draining plate 20 (particularly, the turning shaft 23 and the turning shaft support portion 24) may be damaged.

  In the above, in the hot rolling line in which the descaling device is installed on the upstream side of the hot rolling mill, the case where the slab is reversely conveyed for the reverse rolling is described in mind, but the reverse rolling is performed from the beginning. On the premise, in a hot rolling line in which a descaling device is also installed on the downstream side of the hot rolling mill, the same problem occurs in the descaling device on the downstream side of the hot rolling mill.

  Therefore, in Patent Document 1, when the slab is conveyed toward the hot rolling mill by operating the draining plate of the descaling device with an actuator, the draining plate comes into contact with the slab surface and has a draining function. When the slab is conveyed away from the hot rolling mill, the draining plate is lifted up to be opened to prevent the draining plate from being damaged.

JP-A-7-051731

  However, in the technique described in Patent Document 1, since the actuator is installed, not only the equipment cost is expensive, but also when the actuator fails, there is a risk that the slab stops in the descaling apparatus. Yes.

  The present invention has been made in view of the circumstances as described above, and as a draining plate structure corresponding to the reverse conveyance of the slab in the hot-rolled slab descaling device, the slab can be formed by a simple structure without using an actuator. It aims at providing the draining board structure which can suppress the damage of the draining board at the time of reverse conveyance.

  In order to solve the above problems, the present invention has the following features.

[1] A descaling nozzle for removing scale generated on the surface of a hot-rolled slab by jetting high-pressure descaling water, and a draining plate for draining descaling water jetted from the descaling nozzle In the equipped descaling device, the structure of the draining plate corresponding to the reverse conveyance of the hot rolled slab,
The draining plate is divided into an upper draining plate and a lower draining plate at a position higher than the upper surface of the hot-rolled slab to be conveyed, and the lower draining plate can be turned with respect to the upper draining plate. A draining plate structure that supports reverse conveyance in a hot-rolled slab descaling device.

  [2] In addition, the swivel shaft support portion that supports the swivel shaft of the draining plate has a long hole, and the water drainer that supports reverse conveyance in the hot-rolled slab descaling device according to the above [1] Board structure.

[3] A descaling nozzle for removing the scale generated on the surface of the hot-rolled slab by jetting high-pressure descaling water, and a draining plate for draining descaling water jetted from the descaling nozzle In the equipped descaling device, the structure of the draining plate corresponding to the reverse conveyance of the hot rolled slab,
A draining plate structure corresponding to reverse conveyance in a hot-rolled slab descaling device, wherein a pivoting shaft support portion for supporting the pivoting shaft of the draining plate has a long hole.

[4] A descaling nozzle for removing scale generated on the surface of the hot-rolled slab by high-pressure descaling water and a draining plate for draining descaling water sprayed from the descaling nozzle In the equipped descaling device, the structure of the draining plate corresponding to the reverse conveyance of the hot rolled slab,
Corresponding to reverse conveyance in hot-rolled slab descaling equipment, characterized in that the draining plate has a weight that can resist the pressure of descaling water that tries to swivel the draining plate toward the opposite side of the descaling nozzle Drained board structure.

[5] A descaling nozzle for removing scale generated on the surface of the hot-rolled slab by jetting high-pressure descaling water, and a draining plate for draining descaling water jetted from the descaling nozzle In the equipped descaling device, the structure of the draining plate corresponding to the reverse conveyance of the hot rolled slab,
The draining plate is provided with a turning resistance plate on the opposite side of the descaling nozzle, and the turning resistance plate is installed so as to overlap the draining plate, and its lower end is positioned higher than the upper surface of the hot-rolled slab, When the plate is swung from the vertical direction toward the opposite side of the descaling nozzle, it is pushed by the draining plate and swung from the vertical direction toward the opposite side of the descaling nozzle, thereby reducing the swirling resistance of the draining plate. A draining plate structure corresponding to reverse conveyance in a hot-rolled slab descaling device.

  In the present invention, as a draining plate structure corresponding to the reverse conveyance of the slab in the hot-rolled slab descaling device, it is possible to suppress damage to the draining plate when the slab is reversely conveyed by a simple structure without using an actuator. Can do.

It is a figure which shows the 1st Embodiment of this invention. It is a figure which shows the 2nd Embodiment of this invention. It is a figure which shows the 3rd Embodiment of this invention. It is a figure which shows the 4th Embodiment of this invention. It is a figure which shows the conventional descaling apparatus. It is explanatory drawing in the case of applying the conventional descaling apparatus to levers conveyance. It is a figure which shows the problem at the time of applying the conventional descaling apparatus to levers conveyance.

  Embodiments of the present invention will be described with reference to the drawings. Here, the description will be made on the assumption that the descaling device is installed on the upstream side of the hot rolling mill, but of course, the same applies even when the descaling device is installed on the downstream side of the hot rolling mill. It is.

  In each of the embodiments described below, the basic structure of the descaling apparatus is the structure shown in FIG. 6 described above in order to cope with the reverse conveyance of the slab.

  That is, on the upper surface 1a of the slab 1 conveyed downstream on the roller table 2 toward a hot rolling mill (not shown), the descaling water is injected obliquely from above to the upstream side. A descaling nozzle 11 and a lower descaling nozzle 12 that injects descaling water obliquely from the obliquely lower side toward the upstream side with respect to the lower surface 1b of the slab 1 are provided. On the upstream side, a draining plate 20 that contacts the upper surface 1a of the slab 1 and drains the descaling water sprayed from the upper descaling nozzle 11 and a drainage basin 25 that collects the descaling water drained are provided. ing.

  This draining plate 20 is attached to the draining plate main body 21, the tip of the draining plate main body 21, the draining plate tip rotating part 22 rotating in contact with the upper surface 1 a of the slab 1, and the draining plate 20 being conveyed to the slab 1 A turning shaft 23 that can turn in the direction and a turning support portion 24 that supports the turning shaft 23 are provided.

  And when the slab 1 is not passing through, the draining plate 20 is originally positioned in the vertical direction as shown by a broken line in FIG. And, as shown by the solid line in FIG. 6, when the slab 1 is conveyed downstream toward the hot rolling mill, the draining plate 20 turns downstream with the turning shaft 23 as a fulcrum, When the slab 1 is transported to the upstream side so as to be separated from the hot rolling mill, the draining plate 20 is turned toward the upstream side with the turning shaft 23 as a fulcrum.

  However, in the basic structure of such a descaling device, as shown in FIG. 7A, the draining plate 20 is moved upstream by the pressure of the descaling water sprayed from the upper descaling nozzle 11. The tip of the slab 1 conveyed toward the downstream side collides with the draining plate 20 that turns toward the upstream side, and a large impact force is applied to the draining plate 20. In particular, the turning shaft 23 and the turning shaft support 24) may be damaged.

  Therefore, in each of the following embodiments, the draining plate 20 is configured so that a large impact force is not applied to the draining plate 20 to prevent the draining plate 20 from being damaged.

(Embodiment 1)
Embodiment 1 of the present invention is shown in FIG.

  In the first embodiment, in the descaling device having the basic structure described above, as shown in FIG. 1, the upper draining plate main body 21 a and the lower draining plate main body 21 are located at a position higher than the upper surface 1 a of the slab 1. The lower draining plate main body 21b can turn around the turning fulcrum 31 with respect to the upper draining plate main body 21a.

  When the draining plate 20A having such a divided draining plate main body (upper draining plate main body 21a, lower draining plate main body 21b) is subjected to the pressure of descaling water, FIG. As shown in a), the lower draining plate body 21b turns around the turning fulcrum 31 toward the upstream side. Therefore, even if the tip of the slab 1 conveyed toward the downstream side collides with the lower draining plate main body 21b, the lower draining plate main body 21b turns around the turning fulcrum 31 toward the downstream side. The turning fulcrum 31 itself also turns around the turning shaft support portion 24, so that the impact force applied to the draining plate 20A (in particular, the turning shaft 23 and the turning shaft support portion 24) is reduced. Thereby, damage to the draining board 20A can be prevented.

  Then, as the slab 1 passes, a normal descaling state is obtained as shown in FIG.

  In this manner, in the first embodiment, it is possible to suppress damage to the draining plate when the slab is reversely transported with a simple structure without using an actuator.

(Embodiment 2)
A second embodiment of the present invention is shown in FIG.

  In the second embodiment, in the descaling device having the basic structure described above, as shown in FIG. 2, the turning shaft support portion that supports the turning shaft 23 of the draining plate 20 becomes a turning shaft support portion 33 having a long hole. Yes.

  By setting it as the draining board 20B which has such a revolving shaft support part 33 of a long hole, the draining board 20B swirls toward the upstream with the pressure of descaling water, and is conveyed toward the downstream. 2A, as shown in FIG. 2A, the draining plate main body 21 moves upward by the effect of the pivot shaft supporting portion 33 having a long hole, so that the draining plate 20B (particularly the pivot shaft 23) is moved. And the impact force applied to the turning shaft support portion 33) is alleviated. Thereby, damage to the draining board 20B can be prevented.

  Then, as the slab 1 passes, a normal descaling state is obtained as shown in FIG.

  As described above, in the second embodiment, it is possible to suppress damage to the draining plate when the slab is reversely conveyed by using a simple structure without using an actuator.

(Embodiment 3)
Embodiment 3 of the present invention is shown in FIG.

  In the third embodiment, in the descaling device having the basic structure described above, the draining plate 20 has a weight capable of resisting the pressure of the descaling water that attempts to rotate the draining plate 20 toward the upstream side. For example, as shown in FIG. 3, a weight 35 having a predetermined weight is attached to the draining plate body 21. In addition, it is good also as a weight which can counter the pressure of descaling water with the weight of the draining board main body 21 itself.

  By using the draining plate 20C having a weight that can counteract the pressure of the descaling water, even when the draining plate 20C receives the pressure of the descaling water, as shown in FIG. Since the plate 20C is difficult to turn toward the upstream side, the tip of the slab 1 conveyed toward the downstream side to the draining plate 20 turning toward the upstream side as shown in FIG. 7A described above. The problem of collisions is alleviated. Thereby, damage to the draining plate 20C can be prevented.

  Then, as the slab 1 passes, a normal descaling state is obtained as shown in FIG.

  In this manner, in the third embodiment, it is possible to suppress damage to the draining plate when the slab is reversely conveyed by using a simple structure without using an actuator.

(Embodiment 4)
Embodiment 4 of the present invention is shown in FIG.

  In the fourth embodiment, in the descaling device having the basic structure described above, the draining plate main body is designed so that the draining plate 20 can counter the pressure of the descaling water that attempts to swivel the draining plate 20 toward the upstream side. A turning resistance plate 37 is provided on the upstream side of 21. The turning resistance plate 37 is installed so as to overlap the draining plate main body 21, and when the draining plate main body 21 turns toward the upstream side, the turning resistance plate 37 is pushed together by the draining plate main body 21 together with the turning fulcrum 38 as a center. It turns to the upstream side. The lower end of the turning resistance plate 37 is higher than the upper surface 1 a of the slab 1 so as not to contact the slab 1.

  By making the draining plate 20D provided with such a turning resistance plate 37, even when the draining plate 20D receives the pressure of descaling water, as shown in FIG. Therefore, it becomes difficult for the draining plate 20D to turn toward the upstream side, and as shown in FIG. 7A, the slab is conveyed toward the downstream side to the draining plate 20 that turns toward the upstream side. The problem that the tip of 1 collides is alleviated. Thereby, damage to the draining board 20D can be prevented.

  Then, as the slab 1 passes, a normal descaling state is obtained as shown in FIG.

  As described above, in the fourth embodiment, it is possible to suppress damage to the draining plate when the slab is reversely transported with a simple structure without using an actuator.

  In addition, although said Embodiment 1-4 is a single, respectively and a favorable effect is acquired, it is also possible to acquire a still more favorable effect by combining two or more suitably.

  In particular, the combination of Embodiment 1 (dividing the draining plate main body) and Embodiment 2 (making the pivot shaft support portion a long hole) is a more preferable combination.

  Further, the third embodiment (increasing the weight of the draining plate main body) or the fourth embodiment (the turning resistance plate is adjacent to the draining plate main body) may be combined with the second embodiment (the turning shaft support portion is made into a long hole). It is a suitable combination.

1 Slab (Hot Slab)
DESCRIPTION OF SYMBOLS 1a Upper surface of slab 1b Lower surface of slab 2 Roller table 11a Upper descaling nozzle 11b Lower descaling nozzle 20 Draining plate 20A Draining plate 20B Draining plate 20C Draining plate 20D Draining plate 21 Draining plate body 21a Upper draining plate body 21b Lower draining plate body 22 Rotating Draining Plate Tip Rotating Body 23 Rotating Shaft 24 Rotating Shaft Support Part 25 Catchment 31 Rotating Support Point 33 Rotating Shaft Support Part (Elongated Hole)
35 Weight 37 Turning resistance plate 38 Turning support

Claims (4)

A descaling nozzle for removing scale generated on the surface of the hot-rolled slab by jetting high-pressure descaling water, and a descaling plate provided with a draining plate for draining descaling water jetted from the descaling nozzle. In the scaling device, the structure of the draining plate corresponding to the reverse conveyance of the hot rolled slab,
Deflector board is at a higher position than the upper surface of the hot rolled slab is conveyed, is divided into an upper deflector board and the lower deflector board, together with the lower deflector board is adapted to be pivoted relative to the upper deflector board, in addition The swivel shaft support part that supports the swivel shaft of the draining plate is a long hole with a shape that is elongated in the vertical direction, and the tip of the hot-rolled slab being conveyed toward the descaling nozzle contacts the draining plate In this case, the draining plate structure is adapted for reverse conveyance in a hot-rolled slab descaling device , wherein the draining plate is moved upward . A descaling nozzle for removing scale generated on the surface of the hot-rolled slab by jetting high-pressure descaling water, and a descaling plate provided with a draining plate for draining descaling water jetted from the descaling nozzle. In the scaling device, the structure of the draining plate corresponding to the reverse conveyance of the hot rolled slab,
When the swivel shaft support part that supports the swivel axis of the draining plate is a long hole with a shape elongated in the vertical direction, and the tip of the hot rolled slab being conveyed toward the descaling nozzle contacts the draining plate In addition, the draining plate structure corresponding to the reverse conveyance in the hot-rolled slab descaling apparatus , wherein the draining plate is moved upward . 3. The hot-rolled slab according to claim 1 , wherein the draining plate has a weight capable of resisting the pressure of descaling water that attempts to swivel the draining plate toward the opposite side of the descaling nozzle. Drainer structure for reverse transport in descaling equipment. The draining plate is provided with a turning resistance plate on the opposite side of the descaling nozzle, and the turning resistance plate is installed so as to overlap the draining plate, and its lower end is located higher than the upper surface of the hot-rolled slab, and the draining plate When the plate is swung from the vertical direction toward the opposite side of the descaling nozzle, it is pushed by the draining plate and swung from the vertical direction toward the opposite side of the descaling nozzle, thereby reducing the swirling resistance of the draining plate. The draining board structure corresponding to the reverse conveyance in the hot-rolled slab descaling apparatus according to claim 1 or 2,

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