JP6624983B2 - Ladle tilting device, ladle maintenance equipment and ladle maintenance method - Google Patents

Description

  The present invention relates to a ladle tilting device used when performing maintenance of a ladle including a tilting bracket used when tilting using a crane, and a ladle including the ladle tilting device. The present invention relates to a maintenance facility and a method for preparing a ladle.

In general, in a casting facility for metal such as steel, a ladle 50 as shown in FIGS. 1 and 2 may be used as a means for transporting molten metal.
As shown in FIGS. 1 and 2, the ladle 50 includes a ladle main body 51 in which molten metal is stored, a pair of shaft portions 52 protruding outward from a side surface of the ladle main body 51, It has. At the bottom of the ladle main body 51, a porous plug and a nozzle are provided. The ladle main body 51 is provided with a spout 55 for the stored molten metal.

  The ladle 50 is provided with a tilting bracket 60 used for tilting using the crane 70. The tilting bracket 60 is provided at one end thereof with a hook 61 for locking a hook 71 of a crane 70 and a pivot pin 62 for supporting the hook 61, and the other end is provided on the bottom surface of the ladle body 51. The structure is fixed to the side. One end of the tilting bracket 60 is held on the side surface of the ladle main body 51 by mounting the pivot pin 62 on the mounting surface of the bracket 57 provided on the side surface of the ladle main body 51. .

  When pouring molten metal and steel slag using the ladle 50 having such a structure, the tilting bracket is mounted on a pair of shaft portions 52 provided on the side surface of the ladle main body 51 by a crane or the like. The hook 71 of the crane 70 is locked to the hanging hand 61 provided at one end of the crane 60, and the tilting bracket 60 is moved upward by the crane 70, thereby tilting the ladle 50 about the shaft 52. Thereby, the molten metal and the steel slag are poured out from the outlet 55.

Here, since the ladle is used in a high temperature environment, it is necessary to perform maintenance work such as replacement of the porous plug and the nozzle and repair of the refractory on the inner wall surface of the ladle after use.
When performing such a ladle maintenance work, it is necessary to perform the work in a plurality of postures in which the ladle is tilted. Therefore, for example, a ladle tilting device as disclosed in Patent Document 1 is used. This ladle tilting device includes a ladle holding portion for holding the ladle, and a tilt drive portion for tilting the ladle holding portion, and the ladle is tilted without using a tilting bracket. It is configured to be tiltable.

JP 08-215833 A

  By the way, when the ladle is tilted using the ladle tilting device described in Patent Literature 1, depending on the tilting direction and angle of the ladle, a hook provided at one end of the tilting bracket is provided. Also, the pivot pin comes off the bracket and drops. That is, when the surface holding the tilting bracket is tilted downward, or when the tilt angle exceeds 90 °, the tilting bracket falls. For this reason, when tilting the ladle using the ladle tilting device described in Patent Document 1, it is necessary to limit the tilting direction and the angle so that the tilting bracket does not fall. However, multiple maintenance operations could not be performed efficiently.

  For example, when repairing the refractory on the inner wall surface of the ladle, tilt the ladle so that the opening of the ladle faces the spraying device side to insert the refractory spraying device into the ladle. Need to be done. Also, when removing the porous plug provided at the bottom of the ladle, it is necessary to insert a jig for removing the porous plug into the ladle, so that the opening of the ladle faces the jig side of the porous plug removal jig. It is necessary to tilt the ladle. Here, when the ladle is tilted in only one direction, the spraying device and the porous plug removing jig described above cannot be arranged in the same direction with respect to the ladle tilting device due to the work space. For this reason, when performing a plurality of maintenance work, it was necessary to move the ladle to another place and perform each maintenance work.

  The present invention has been made in view of the above-described situation, and is capable of suppressing the falling of the tilting bracket and setting the tilting direction and tilting angle of the ladle relatively freely. It is an object of the present invention to provide an apparatus, a ladle maintenance facility including the ladle tilting apparatus, and a ladle maintenance method.

  In order to solve the above problems, a ladle tilting device according to the present invention is a ladle tilting used when performing maintenance of a ladle provided with a tilting bracket used when tilting using a crane. In the apparatus, the tilting bracket is provided at one end thereof with a hanger to which a hook of the crane is locked and a pivot pin for supporting the hanger, and the other end is provided on the bottom surface of the ladle. The tilting bracket is fixed, and one end side of the tilting bracket is structured to be held on a side surface of the ladle by mounting the pivot pin on a bracket provided on a side surface of the ladle. A ladle holding unit that holds the ladle provided with the tilting bracket, and a tilt drive unit that tilts the ladle holding unit about the tilt axis together with the ladle, In the ladle holding portion, the holding arranged toward the mounting surface of the bracket described above. And over arm, it is characterized in that the arm drive unit for close to and away from towards the holding arm before mounting surface, the tilt bracket fixing means having a provided.

  According to the ladle tilting device having this configuration, the ladle holding portion is provided with the holding arm disposed toward the mounting surface of the bracket support pin of the bracket, and the holding arm is directed toward the mounting surface. And an arm drive unit for moving the arm closer to and away from each other, so that a pivot pin provided at one end of the tilting bracket is held between the bracket of the ladle and the holding arm. It can be fixed, and when the ladle is tilted, it is possible to prevent the pivot pin and the hanging hand from dropping from the bracket. Therefore, the tilt direction and tilt angle of the ladle can be set relatively freely.

  Here, in the ladle tilting device of the present invention, the holding arm has a cutout portion opened toward the placing surface, and the opening length of the cutout portion is the diameter of the pivot pin. It is preferable that the depth of the notch is in the range of 0.1 to 2 times the diameter of the pivot pin.

In this case, the holding arm has a cutout opening toward the mounting surface described above, and the opening length of the cutout is set to be in a range of 2 to 5 times the diameter of the pivot pin. Therefore, even if the ladle has a different bracket position, it is possible to accurately fix the pivot pin by the holding arm.
Further, since the depth of the notch is in the range of 0.1 times or more and 2 times or less of the diameter of the pivot pin, the pivot pin is accurately pinched and fixed by the holding arm and the bracket. Can be.

  A ladle maintenance facility according to the present invention is a ladle maintenance facility for maintaining a ladle provided with a tilting bracket used when tilting using a crane, and includes the ladle tilting device described above. And, one maintenance jig is provided on one side of the ladle tilting device in the tilting direction, and another maintenance jig is provided on the other side of the ladle tilting device in the tilting direction. It is characterized by.

  According to the ladle maintenance equipment having this configuration, the ladle tilting device described above is provided, and one maintenance jig is disposed on one side of the ladle tilting direction of the ladle tilting device. Since another maintenance jig is arranged on the other side in the tilting direction of the device, the ladle is tilted in one direction to perform maintenance work using one maintenance jig, and Can be tilted in another direction to perform a maintenance operation using another maintenance jig, and a plurality of maintenance operations can be efficiently performed.

  A ladle maintenance method according to the present invention is a ladle maintenance method for maintaining a ladle provided with a tilting bracket used when tilting using a crane, the ladle tilting device described above. With the tilting bracket fixed by the tilting bracket fixing means, the ladle is tilted in one direction to perform one maintenance operation, and the ladle is tilted in another direction. It is characterized by turning over and performing other maintenance work.

  According to the ladle maintenance method of this configuration, since the above-described ladle tilting device is used, even if the tilting direction and tilting angle of the ladle are set relatively freely, the tilting bracket falls. Can be suppressed. In addition, since the ladle is tilted in one direction to perform one maintenance operation, and the ladle is tilted in the opposite direction to perform another maintenance operation, a plurality of maintenance operations are performed. It can be done efficiently.

  As described above, according to the present invention, a ladle tilting device capable of suppressing the tilting bracket from falling and setting the tilting direction and tilting angle of the ladle relatively freely, It is possible to provide a ladle maintenance facility provided with a turning device and a ladle maintenance method.

It is a side view which shows an example of the ladle used as an object of this invention. It is a rear view of the ladle shown in FIG. It is a front view of the ladle tilting apparatus which is embodiment of this invention. It is a top view of the ladle tilting apparatus shown in FIG. It is explanatory drawing of the metal fitting fixing | tilting means for tilt provided with the ladle tilting apparatus which is embodiment of this invention. FIG. 6 is a rear view of the tilting bracket fixing means shown in FIG. 5. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing of the ladle maintenance equipment provided with the ladle tilting apparatus which is embodiment of this invention.

Hereinafter, a ladle tilting device, a ladle maintenance facility, and a ladle maintenance method according to embodiments of the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to the following embodiments.
A ladle 50 to which the ladle tilting device 10 and the ladle maintenance method according to the present embodiment are applied includes, for example, as shown in FIGS. And a pair of shaft portions 52 protruding outward from the side surface of the ladle main body 51. At the bottom of the ladle main body 51, a porous plug and a nozzle are provided. The ladle main body 51 is provided with a spout 55 for the stored molten metal.

  The ladle 50 is provided with a tilting bracket 60 used for tilting using the crane 70. The tilting bracket 60 is provided at one end thereof with a hook 61 for locking a hook 71 of a crane 70 and a pivot pin 62 for supporting the hook 61. The other end is a bottom surface of the ladle body 51. One end of the tilting bracket 60 is mounted on a bracket 57 provided on a side surface of the ladle main body 51, so that the pivot pin 62 is placed on the bracket 57. It is held on the side. The tilting bracket 60 is disposed at a position 180 ° with respect to the spout 55 when the upper opening of the ladle 50 is viewed from above. The pair of shaft portions 52 are disposed at 90 ° positions with respect to the spout 55 and the tilting bracket 60, respectively.

Next, the ladle tilting device 10 according to the present embodiment will be described with reference to FIGS. The ladle tilting device 10 according to the present embodiment is used when the used ladle 50 is maintained.
As shown in FIGS. 3 and 4, the ladle tilting device 10 includes a ladle holding unit 20 that holds a ladle 50, and a tilt drive unit that tilts the ladle holding unit 20 together with the ladle 50. And 11.

As shown in FIGS. 3 and 4, the ladle holding portion 20 has a shaft housing portion 21 for housing the shaft portion 52 of the ladle 50, and is located below the shaft housing portion 21 and is directed outward. And a pair of tilting shaft portions 22 extending therefrom are provided.
Further, the ladle holding portion 20 is provided with a front frame 23 located on the front side (the spout 55 side) of the held ladle 50 and a back frame 24 located on the back side of the ladle 50. Have been.
The tilt drive section 11 includes a bearing section 12 that receives the tilt shaft section 22 of the ladle holding section 20, and a tilt drive section 13 that drives the tilt shaft section 22 to tilt.

  The ladle tilting device 10 according to the present embodiment includes the tilting bracket fixing means 30 for fixing the tilting bracket 60 attached to the ladle 50. In the present embodiment, as shown in FIG. 4, the tilting bracket fixing means 30 is disposed on the back frame 24 of the ladle holding portion 20, and tilts with the ladle 50 and the ladle holding portion 20. It has been.

As shown in FIGS. 5 and 6, the tilting bracket fixing means 30 includes a holding arm 31 arranged to face the mounting surface of the bracket 57 of the ladle 50, and a mounting arm 31 for mounting the holding arm 31. And an arm drive unit 35 that moves toward and away from the surface.
The tilting bracket fixing means 30 is configured to fix the pivot pin 62 of the tilting bracket 60 mounted on the mounting surface to the bracket 57 by sandwiching the pin 62 between the bracket 57 and the holding arm 31. I have.

  In the present embodiment, the projection 32 is formed on the back surface of the holding arm 31, and the base end side of the holding arm 31 is pivotally supported by the rotating shaft 39. In addition, an air cylinder 35 having a cylinder body 36 and a rod part 37 protruding and retracting from the cylinder body 36 is provided as the arm driving unit 35. The protruding part 32 of the holding arm 31 is connected to the tip of the rod part 37 of the air cylinder 35. When the rod part 37 is made to protrude and retract, the holding arm 31 rotates about the rotation shaft 39 and faces the mounting surface. Are configured to approach and separate from each other.

In the present embodiment, a notch 33 opened toward the mounting surface is provided at the tip end of the holding arm 31.
As shown in FIG. 5, the opening length L of the notch 33 is set within a range of 2 × R ≦ L ≦ 5 × R with respect to the diameter R of the pivot pin 62 of the tilting bracket 60. I have.
The depth D of the notch 33 is set within the range of 0.1 × R ≦ D ≦ 2 × R with respect to the diameter R of the pivot pin 62 of the tilting bracket 60.

Here, the height position of the bracket 57 provided on the ladle 50 is different for each of the plurality of ladles 50. This is because the mounting position of the bracket 57 is raised in order to prevent the tilting bracket 60 from being loosened and fixed when the tilting bracket 60 expands during use. The height position of the bracket 57 changes according to the use condition of the pot 50. Therefore, in the present embodiment, the opening length L of the notch 33 is set to be at least twice the diameter R of the support pin 62, so that even if the height position of the bracket 57 varies, the support The pin 62 can be held and fixed between the mounting surface of the bracket 57 and the holding arm 31.
On the other hand, by setting the opening length L of the notch 33 to be five times or less the diameter R of the pivot pin 62, the pivot pin 62 is accurately pinched between the mounting surface of the bracket 57 and the holding arm 31. Can be fixed.
In addition, in order to ensure such an effect, the lower limit of the opening length L of the notch 33 is preferably at least twice the diameter R of the pivot pin 62, and more preferably at least three times. More preferably, Further, the upper limit of the opening length L of the notch 33 is preferably 5 times or less, more preferably 4 times or less, with respect to the diameter R of the pivot pin 62.

By setting the depth D of the notch 33 to be 0.1 times or more the diameter R of the pivot pin 62, the notch 33 of the holding arm 31 can be sufficiently engaged with the pivot pin 62. Thus, the pivot pin 62 can be accurately pinched and fixed between the mounting surface of the bracket 57 and the holding arm 31.
On the other hand, by setting the depth D of the notch 33 to twice or less the diameter R of the support pin 62, the holding arm 31 is prevented from interfering with the mounting surface, and the support pin 62 is sufficiently inserted. It becomes possible to pinch and fix.
In order to ensure such an effect, the lower limit of the depth D of the notch 33 is preferably set to 0.1 times or more of the diameter R of the pivot pin 62. More preferably, it is at least twice. Further, the upper limit of the depth D of the notch 33 is preferably not more than twice the diameter R of the pivot pin 62, and more preferably not more than 1 time.

Next, the ladle maintenance equipment 40 according to the present embodiment will be described with reference to FIG.
As shown in FIG. 7, the ladle maintenance equipment 40 of the present embodiment includes the above-described ladle tilting device 10, and is provided on one side (left side in FIG. 7) of the ladle tilting device 10 in the tilting direction. A refractory spraying device 41 is provided as one maintenance jig, and a porous plug punching device as another maintenance jig is provided on the other side (right side in FIG. 7) of the ladle tilting device 10 in the tilting direction. 42 are provided. Further, below the ladle tilting device 10, a bucket 43 for discharging metal and steel slag is disposed.

The spraying device 41 is inserted into the ladle 50 from the opening of the ladle 50 tilted toward one side in the tilting direction, as shown in FIG. It is designed to repair by spraying objects.
On the other hand, the porous plug punching device 42 presses the porous plug, which is introduced from the opening of the ladle 50 tilted by approximately 90 ° toward the other side in the tilting direction, and disposed on the bottom surface of the ladle 50. And remove it.
That is, in the present embodiment, the ladle 50 is tilted in one direction by the ladle tilting device 10 to spray refractory as one maintenance operation, and the ladle 50 is tilted in the other direction. Then, a porous plug is punched out as another maintenance work.
In addition, the metal in the ladle 50 is discharged to the metal discharge bucket 43 by tilting the ladle 50 more than 90 °.

  According to the ladle tilting apparatus 10 of the present embodiment having the above-described configuration, the holding arm 31 arranged to face the mounting surface of the bracket 57 of the ladle 50, and the holding arm 31 An arm drive unit (air cylinder) 35 for moving the arm 31 toward and away from the mounting surface. The pivoting pin 62 of the tilting bracket 60 mounted on the mounting surface is connected to the bracket 57 and the holding arm 31. Since the tilting metal fitting fixing means 30 for clamping and fixing the ladle 50 is provided, even if the ladle 50 is tilted in any tilting direction, or even if it is tilted to any tilting angle, The tilting bracket 60 is prevented from falling from the bracket 57. Therefore, the tilt direction and tilt angle of the ladle 50 can be set relatively freely, and the ladle 50 can be held in a plurality of tilt positions.

Further, in the present embodiment, a notch 33 opened toward the mounting surface is provided on the tip end side of the holding arm 31, and the opening length L of the notch 33 is determined by the axis of the tilting bracket 60. Since it is set within the range of 2 × R ≦ L ≦ 5 × R with respect to the diameter R of the support pin 62, even if the height position of the bracket 57 is different, the support arm 31 supports the ladle. The pin 62 can be fixed accurately.
Further, since the depth D of the notch 33 is set within the range of 0.1 × R ≦ D ≦ 2 × R with respect to the diameter R of the pivot pin 62 of the tilting bracket 60, the holding arm The pivot pin 62 can be pinched and fixed accurately by the bracket 31 and the bracket 57.

Further, according to the ladle maintenance equipment 40 and the ladle maintenance method of the present embodiment, the ladle tilting device 10 is provided, and one side of the ladle tilting direction of the ladle tilting device 10 (see FIG. 7). On the left side, a refractory spraying device 41 is provided as one maintenance jig. On the other side (right side in FIG. 7) of the ladle tilting device 10 in the tilting direction, a porous plug is provided as another maintenance jig. Since the punching device 42 is provided, it is possible to perform the refractory spraying operation and the porous plug punching operation while holding the ladle 50 in the ladle tilting device 10 according to the present embodiment. The maintenance work can be performed efficiently. Further, the work space required for the maintenance work of the ladle 50 can be significantly reduced.
Further, in the present embodiment, the metal and steel slag discharging buckets 43 are provided below the ladle tilting device 10, so that the ladle is tilted greatly beyond 90 °, thereby making the ladle tiltable. The ingot and steel slag in 50 can be discharged to the buckle and steel slag discharge bucket 43.

As described above, the ladle tilting device, the ladle maintenance equipment, and the ladle maintenance method according to the present embodiment, which are the embodiments of the present invention, have been described. However, the present invention is not limited thereto. It can be changed as appropriate without departing from the technical idea.
For example, in the present embodiment, the ladle shown in FIGS. 1 and 2 has been described as an example. However, the present invention is not limited to this, and if a ladle is provided, a ladle having another structure can be used. There may be.

Further, in the present embodiment, the description has been made assuming that an air cylinder is used as the arm driving unit. However, the present invention is not limited to this, and a driving unit having another structure such as a hydraulic cylinder or a ball screw may be applied. .
Furthermore, as an example of the maintenance jig, a refractory spraying apparatus and a porous plug punching apparatus have been described, but other maintenance jigs may be provided.

Hereinafter, the results of experiments performed to confirm the effects of the present invention will be described.
As an example of the present invention, a ladle tilting operation was performed using the ladle tilting device described in the present embodiment. Regardless of the tilting direction and tilting angle of the ladle, the tilting bracket did not fall.

  As a comparative example, a ladle tilting operation was performed using a conventional ladle tilting device that did not include the tilting metal fixture. If the tilting bracket is tilted so that the surface on which the tilting bracket is arranged faces downward, or if the tilting angle exceeds 90 °, the tilting bracket will drop and tilt the ladle. Could not.

  As described above, according to the ladle tilting device of the present invention, it was confirmed that the tilting bracket can be prevented from falling and the tilting direction and tilting angle of the ladle can be set relatively freely.

DESCRIPTION OF REFERENCE NUMERALS 10 Ladle tilting device 11 Tilt driving unit 20 Ladle holding unit 30 Tilting bracket fixing means 31 Holding arm 33 Notch 35 Arm driving unit 40 Ladle maintenance equipment 41 Spraying device (one maintenance jig)
42 Porous plug punching device (other maintenance jig)
Reference Signs List 50 Ladle 57 Bracket 60 Tilt bracket 61 Hanger 62 Shaft support pin 70 Crane 71 Hook

Claims (4)

A ladle tilting device used when performing maintenance of a ladle having a tilting bracket used when tilting using a crane,
The tilting bracket is provided at one end thereof with a hanger for hooking the hook of the crane and a pivot pin for supporting the hanger, and the other end is fixed to the bottom surface of the ladle, One end side of the tilting bracket has a structure held on the side surface of the ladle by mounting the pivot pin on a bracket provided on the side surface of the ladle,
A ladle holding unit that holds the ladle provided with the tilting bracket, and a tilt drive unit that tilts the ladle holding unit about the tilt axis together with the ladle,
The ladle holding part includes a holding arm arranged toward the mounting surface of the bracket, and an arm driving unit configured to move the holding arm toward and away from the mounting surface. A ladle tilting device comprising a fixing means.   The holding arm has a cutout opening toward the mounting surface described above, and the opening length of the cutout is within a range of 2 to 5 times the diameter of the pivot pin, The ladle tilting apparatus according to claim 1, wherein a depth of the notch is in a range of 0.1 times or more and 2 times or less of a diameter of the pivot pin. Ladle maintenance equipment for maintenance of a ladle equipped with a tilting bracket used when tilting using a crane,
The ladle tilting device according to claim 1 or 2, wherein a maintenance jig is disposed on one side of the ladle tilting direction of the ladle tilting device. Ladle maintenance equipment characterized in that another maintenance jig is arranged on the other side in the tilting direction. A ladle maintenance method for maintaining a ladle equipped with a tilting bracket used when tilting using a crane,
The ladle is tilted in one direction in a state where the tilting bracket is fixed by the tilting bracket fixing means, using the ladle tilting device according to claim 1 or 2. A method for maintaining a ladle, wherein the ladle is tilted in another direction to perform another maintenance operation.

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