JP2010117045A - Deposit scrape-up device of impeller for desulfurizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deposit scrape-up device of an impeller for a desulfurizer capable of improving the lifetime of the impeller and increasing the operation rate of the desulfurizer by efficiently removing slug, etc., deposited on the impeller. <P>SOLUTION: The deposit scrape-up device of the impeller for the desulfurizer is composed of an arm member 130 having a scraping plate 134 at its tip and capable of oscillating around a vertical shaft and in a vertical surface. The deposit scrape-up device comprises an oscillating mechanism which moves around the vertical shaft and is composed of a rotation member 122 having a lever-like member projecting to the horizontal direction and an air cylinder device with a piston rod connected to the lever-like member, and an oscillating mechanism which moves within the vertical surface and is composed of a balance weight mounting member 151, a balance weight 152 fixed to the other end of the balance weight mounting member, and an air cylinder device 154 mounted to the balance weight mounting member closer to the arm member than the rotation member so as to be able to oscillate within the vertical surface and having a piston rod connected to the rotation member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a scraping device such as slag attached to an impeller for a desulfurization device used for desulfurization of hot metal.

  Conventionally, a mechanical agitation in which a desulfurizing agent is put into a ladle containing hot metal and the impeller is immersed in the ladle in the ladle and the impeller is rotated to stir and mix the hot metal and the desulfurizing agent to desulfurize the hot metal. A type desulfurization apparatus is known (see Patent Document 1).

FIG. 1 shows an example of a stirrer of a desulfurization apparatus used for the desulfurization.
The stirrer 20 is rotatably supported by the cylindrical body 26 by a cylindrical body 26 connected to a tip end portion of a deck 24 that supports the agitator 20 so as to be movable up and down, and an upper and lower bearing disposed at the axial center of the cylindrical body 26. A drive shaft comprising a drive shaft 28, an impeller 11 that is detachably attached to the lower end of the drive shaft 28 via a coupling 29, a motor fixed on the deck 24, and a gear transmission mechanism that connects the motor and the drive shaft 28. And rotating means 38.

  In addition, the main body of the desulfurization apparatus (not shown) is provided with a dust-proof cover 22 covered with a refractory material at a position covering the upper portion of the ladle 30 above the impeller 11 to collect dust generated during desulfurization through the exhaust duct. It has become a collection.

In general, the surface of the impeller 11 immersed in the hot metal is coated with a refractory to prevent the impeller from being damaged by high-temperature hot metal. However, as the number of uses increases, the refractory is peeled off and missing. Or, as described in Patent Document 1, slag adheres and deforms.
For this reason, in the agitator, it is necessary to periodically replace the impeller.
JP 2001-248975 A

By the way, when slag adheres to an impeller, the lifetime of an impeller can be improved by removing slag.
Conventionally, the removal of slag has been performed manually by a person either after the impeller with the slag adhered is removed from the drive shaft of the stirrer or when the desulfurization apparatus is in a standby state.
However, replacing the impeller is time consuming. Moreover, although the impeller immersed in the hot metal in a ladle is very high temperature, it takes time also to cool to the temperature which can remove slag manually. And after cooling, there existed a problem that the removal operation | work became difficult because the slag adhering to the impeller solidified.

  Accordingly, the present invention provides a desulfurization device impeller scraping device that can improve the life of the impeller and increase the operating rate of the desulfurization device by efficiently removing slag and the like adhering to the impeller. For the purpose.

  In order to achieve the above object, the invention according to claim 1 is a desulfurization apparatus comprising a scraping plate 134 at the tip, and an arm member 130 that is swingable in the vertical plane around the vertical axis. In the impeller scraping device for an impeller, one end of the arm member 130 is pivotally mounted around the horizontal axis, and is rotatable about the vertical axis with respect to the gantry-side member 121. A vertical shaft comprising a rotary member 122 projecting in the horizontal direction and an air cylinder device 142 attached to the other base member 141 so as to be swingable in a horizontal plane and having a piston rod coupled to the lever-like member 125. A surrounding swing mechanism, a balance weight attachment member 151 having one end fixed to the arm member 130 and extending in the opposite direction to the arm member 130 beyond the rotating member 122; A balance weight 152 fixed to the other end of the eight attachment member 151, and attached to the arm member 130 on the balance weight attachment member 151 so as to be swingable in a vertical plane with respect to the rotation member 122. And a swing mechanism in a vertical plane including an air cylinder device 154 coupled to 122 and 123.

  The invention according to claim 2 is the invention according to claim 1, wherein the arm member 130 is disposed in parallel below the first arm member 131 and the first arm member 131 to which the balance weight attaching member 151 is fixed. And the other end of the arm member 130 is pivotally attached to the attachment member 133 of the scraper plate 134 so as to be rotatable about a horizontal axis, thereby constituting a parallel link mechanism. To do.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the scraper plate 134 is formed such that an end contacting the impeller deposit is formed in an uneven shape.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the scraper plate 134 is in contact with the tangential direction of the impeller so as to be obtuse in the rotational direction. To do.

The impeller deposit scraping device for a desulfurization apparatus of the invention according to claim 1 can efficiently remove slag and the like adhering to the impeller during standby of the desulfurization apparatus without replacing the impeller. The service life can be improved and the operating rate of the desulfurization apparatus can be increased.
Further, unlike the case of manually removing slag and the like, there is no waiting for the impeller to cool, and the slag or the like attached to the impeller is hardened and the removal operation is not difficult.

Since the arm member 130 having the scraper 134 at the tip end swings around the vertical axis and within the vertical plane, the impeller scraping device for the impeller for the desulfurization apparatus of the invention according to claim 1 The deposits can be removed over a wide range from the rotating shaft to the stirring blade.
In addition, since the scraper plate 134 is brought into contact with the impeller by the air cylinder devices 142 and 154, when the impeller is hard such as pig iron, the scraper plate 134 is used as the air cylinder device 142. , 154 can be retreated against the urging force, and damage can be avoided.

  The impeller deposit scraping device for an impeller for a desulfurization apparatus according to claim 2 is configured so that the first arm member 131 and the second arm member 132 constituting the arm member 130 are parallel to the rotating member 122 and the scraper plate attaching member 133. Therefore, even when the arm member 130 swings in the vertical plane, the scraper 134 does not change its posture, and slag and the like attached to the impeller can be removed appropriately and efficiently. .

  In the impeller deposit scraping device for a desulfurization apparatus according to the third aspect of the invention, the scraper plate 134 is formed such that the end portion that comes into contact with the impeller deposit is formed in an uneven shape. Can be easily caught on slag or the like attached to the impeller, and the attached matter can be efficiently removed.

  The impeller deposit scraping device for an impeller for a desulfurization apparatus according to claim 4 is configured such that the scraper plate 134 contacts the tangential direction of the impeller so as to make an obtuse angle in the rotational direction. It becomes easy to discharge slag and the like removed from the surface, and deposits can be efficiently removed.

  Embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a front view of a desulfurization apparatus impeller scraping device of the present invention, and FIG. 3 is a plan view of the desulfurization apparatus impeller scraping device of the present invention.
The deposit scraping device in the embodiment of the present invention is provided in the vicinity of the stirrer in the desulfurization device, and is fixed to the fixed shaft 121 in the vertical direction with respect to a gantry or the like in the desulfurization device main body. A rotating cylinder 122 having a lever-like member 125 that is supported rotatably through a bearing or the like and protrudes in the horizontal direction. One end of the rotating cylinder 122 is pivotally mounted about a horizontal axis and is in a vertical plane. The arm member 130 that can be swung by the arm member 130, the scraper plate mounting member 133 that is pivotally attached to the other end of the arm member 130 so as to be rotatable about a horizontal axis relative to the arm member 130, and the scraper plate mounting member It has a scraper plate 134 that is attached to the lower side of 133 in the vertical direction and whose width direction is slightly shifted from the direction perpendicular to the axis of the arm member 130.
The arm member 130 includes a first arm member 131 and a second arm member 132 arranged in parallel below the first arm member 131. A rotary cylinder 122 pivotally attached at one end thereof and a scraper plate attached pivotally attached at the other end. The member 133 constitutes a parallel link mechanism, and even if the arm member 130 swings in the vertical plane, the posture of the scraper plate 134 that is attached to the lower side of the scraper attachment member 133 in the vertical direction does not change. It has become.
Further, the scraper plate 134 is formed in a concavo-convex shape at its side end and lower end that comes into contact with slag or the like attached to the impeller, and is easily caught on the attached matter.

  The deposit scraping device according to the embodiment of the present invention includes a first air cylinder device 142 that is swingably mounted in a horizontal plane with respect to a first air cylinder device mounting plate 141 that is fixed to a mount or the like in the desulfurization device body. 3 and connecting the piston rod of the first air cylinder device 142 to a lever-like member 125 projecting from the rotary cylinder 122, the arm member 130 is centered on the axis of the rotary cylinder 122 as shown in FIG. It can be swung in the C direction shown in FIG.

  Further, in the deposit scraping device according to the embodiment of the present invention, one end is fixed on the first arm member 131, and the first arm member extends beyond the rotating cylinder 122 so as to sandwich the rotating cylinder 122 from both sides. A pair of balance weight mounting members 151 extending in the opposite direction to 131, a balance weight 152 fixed to the other end of the pair of balance weight mounting members 151, and the pair of balance weight mounting members 151, than the rotating cylinder 122. It has the 2nd air cylinder device 154 attached to the 2nd air cylinder device attachment board 153 fixed to the arm member 130 side so that rocking within a perpendicular plane is possible, and the piston rod of this 2nd air cylinder device 154 Is connected to a rotating member 123 fixed above the rotating cylinder 122 and capable of rotating integrally with the rotating cylinder 122. , The arm member 130 is configured to be swingable in the direction B shown in FIG. 2 in a vertical plane.

Next, a method for scraping slag and the like attached to the impeller using the attached matter scraping device according to the present embodiment will be described.
In the standby state of the desulfurization apparatus, first, the impeller 111 to which the slag or the like 113 is attached together with the agitator is raised to a predetermined height where the scraping apparatus is located.
Next, when the impeller 111 is rotated in the direction A shown in FIG. 3, the first air cylinder 142 of the scraping device is operated, and the arm member 130 is turned around the rotating cylinder 122, the slag adhering to the impeller 111 is obtained. The scraping plate 134 attached to the distal end side of the arm member 130 comes into contact with the arm 113, and the adhering material such as the slag 113 is scraped off by the scraping plate 134 (see FIG. 3).
Thereafter, the first air cylinder device 142 retracts the arm member 130 from the position where the arm member 130 once contacts the impeller 111.
Then, the second air cylinder device 154 of the scraping device is actuated, and the arm member 130 pivotally attached to the rotating cylinder 122 is pivoted a predetermined amount downward in the vertical plane around the pivot (see FIG. 2). ), The first air cylinder device 142 is actuated again, the arm member 130 is turned around the rotary cylinder 122, and the scraper 134 attached to the tip end side of the arm member 130 is attached to the slag 113 attached to the impeller 111. The scraping plate 134 scrapes off deposits such as the slag 113.
By repeating the above operation, it is possible to scrape the slag 113 attached to the rotating shaft of the impeller 111 and the stirring blade.

  The deposit scraping device in the present embodiment is configured to rotate the arm member 30 around the vertical axis and in the vertical plane, and the air cylinder device 142 as a means for bringing the scraping plate 134 into contact with the impeller 111. , 154, even when the scraper 134 attached to the distal end side of the arm member 130 comes into contact with a hard object such as pig iron, the scraper 134 is used for the air cylinder devices 142, 154. It is possible to evacuate without difficulty against the urging force and avoid damage.

  Further, the arm member 30 is composed of a first arm member 131 and a second arm member 132 arranged in parallel below the first arm member 131, and a rotary cylinder 122 pivotally attached at one end thereof and a scraper plate pivotally attached at the other end. The mounting member 133 forms a parallel link mechanism, and even if the arm member 130 swings in the vertical plane, the posture of the scraping plate 134 that is mounted below the scraping plate mounting member 133 in the vertical direction does not change. Therefore, slag and the like attached to the impeller can be removed appropriately and efficiently.

  Furthermore, since the scraping plate 134 has an uneven end that contacts the impeller deposit, the scraper 134 is easily caught by slag or the like adhering to the impeller, and the deposit is efficiently removed. be able to.

  Since the scraper 134 is in contact with the impeller tangential direction so as to make an obtuse angle in the rotational direction, it is easy to discharge the slag and the like removed from the impeller surface by the scraper 134, and the deposits are efficiently removed. Can be removed well.

  The scraping method described above is an example of how to use the deposit scraping device according to the present embodiment. For example, the scraper 134 is moved so as to draw a spiral on the peripheral surface of the impeller. A person skilled in the art can appropriately determine how to turn and swing the arm member 30 around the vertical axis and within the vertical plane when scraping slag or the like adhering to the surface.

  The present invention can improve the service life of the desulfurizer and increase the operating rate of the desulfurizer by efficiently removing slag and the like attached to the impeller.

Schematic which shows the stirrer of a stirring-type desulfurization apparatus. The front view of the deposit | attachment scraping apparatus of the impeller for desulfurization apparatuses of this invention. The top view of the deposit | attachment scraping apparatus of the impeller for desulfurization apparatuses of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Impeller 12 ... Rotary shaft 20 ... Stirrer 22 ... Dust-proof cover 24 ... Deck 26 ... Cylindrical body 28 ... Drive shaft 29 ... Coupling 30 ... Removal Pan 38 ... Drive shaft rotating means 111 ... Impeller 113 ... Deposits 121 such as slag ... Fixed shaft 122 ... Rotating cylinder 123 ... Rotating member 125 ... Lever member 130 ... · Arm member 131 ··· First arm member 132 ··· Second arm member 133 ··· Scrap plate mounting member 134 ··· Scrap plate 141 ··· First air cylinder mounting plate 142 ··· First air Cylinder device 151 ... balance weight mounting member 152 ... balance weight 153 ... second air cylinder mounting plate 154 ... second air cylinder device A ... direction of rotation of impeller during slag scraping Horizontal swinging direction of the vertical plane swing direction C ... arm member ... arm member

Claims (4)

In a desulfurization apparatus impeller scraping device having a scraping plate (134) at the tip, and provided with an arm member (130) that can swing around a vertical axis in a vertical plane,
One end of the arm member (130) is pivotally mounted around the horizontal axis and is rotatable about the vertical axis with respect to the gantry side member (121), and the lever-like member (125) protrudes in the horizontal direction. An air cylinder device (142) attached to the rotating member (122) and the other gantry side member (141) so as to be swingable in a horizontal plane, and having a piston rod coupled to the lever-like member (125), A swing mechanism around the vertical axis,
One end is fixed to the arm member (130) and extends beyond the rotating member (122) in the opposite direction to the arm member (130). The other end of the balance weight mounting member (151) A fixed balance weight (152) is mounted on the balance weight attachment member (151) so as to be swingable in a vertical plane on the arm member (130) side of the rotation member (122), and the piston rod is attached to the rotation member. An impeller scraping device for an impeller for a desulfurization device, comprising: a swing mechanism in a vertical plane comprising an air cylinder device (154) coupled to (122) and (123).   The arm member (130) includes a first arm member (131) to which the balance weight attaching member (151) is fixed, and a second arm member (132) disposed in parallel below the first arm member (131). The other end of the arm member (130) is pivotally attached to the attachment member (133) of the scraper plate (134) so as to be rotatable about a horizontal axis, thereby constituting a parallel link mechanism. The impeller scraping device for an impeller for a desulfurization device according to claim 1.   The impeller deposit scraping device for an impeller for a desulfurization apparatus according to claim 1 or 2, wherein the scraping plate (134) has an end portion in contact with the impeller deposit formed in an uneven shape.   4. The desulfurization apparatus impeller scraping device according to claim 1, wherein the scraper abuts against the tangential direction of the impeller so as to form an obtuse angle in the rotational direction. 5. Take-off device.