JPH07102449B2 - Slug skimming device for branch gutter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag skimming device for a branch gutter that scrapes out slag in a gutter part that receives molten metal from a melting furnace in a metal melting facility.

2. Description of the Related Art In recent years, a method in which molten metal discharged from a furnace is put in a gutter and slag floating on the surface of the molten metal is automatically removed is proposed, for example, in Japanese Patent Laid-Open Nos. 63-238391 and 63-238392. Has been done.

For example, in the type copper equipment, when the molten metal is sent from the melting furnace to two casting plants, a branch gutter 2 is arranged at the tip of the outlet gutter 1 as shown in FIGS. 6 and 7. It will be distributed to outflow gutters 3A and 3B leading to each foundry. In this branch gutter 2, a gutter body 4 is provided with a basin 5 and groove-shaped hot water outlets 6A and 6B communicating with the basin are provided on both left and right sides.
Then, the pool 5 is partitioned into a central slag floating part 5a and outlet parts 5b, 5c by front and rear dams 7A and 7B, and the molten metal supplied from the tapping gutter 1 to the slag floating part 5a is 7B
Flows through the molten metal passage spaces 8A, 8B below to the outlets 5b, 5c,
The slag with a small specific gravity floats in the slag floating portion 5a. Further, in order to scrape out the floating slag, a slag scraping groove 9 is formed in the front part of the slag floating portion 5a and is continuous with an inclined bottom wall 9a which is inclined upward and forward from the bottom surface of the slag floating portion 5a. It has a horizontal bottom wall 9b along a horizontal plane. This branch gutter 2 is used when tapping water to both derived gutters 3A and 3B.
When the branch gutter 2 is placed horizontally as shown in FIG. 6 and only one of the outlet gutters 3A is tapped, as shown in FIG.
The branch gutter 2 is used in an inclined state so that the hot water outlet 6A on the side of the outlet gutter 3A is at a low position.

When removing floating slag from such a branch gutter 2,
As shown in FIG. 9, the lower end of the rake plate 10 is brought into contact with the molten metal surface, and the rake plate 10 is moved from the molten metal surface along the inclined bottom wall 9a and the horizontal bottom wall 9b as shown by the arrow to scrape out the slag. .

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A conventional slag skimming device maintains a constant molten metal level and sets a constant descent level of a rake plate for scraping slag, or indirectly detects the molten metal level. Although it has a function of controlling the descending position of the above, there is the following problem when these are applied to the branch gutter 2.

(1) When the gutter body 4 is used in an inclined state, as shown in FIG. 10, there is a gap between the rake plate 10 and the bottom surface of the inclined bottom wall 9a and the bottom surface of the horizontal bottom wall 9b of the slag scraping groove 9. You cannot reliably scrape out the slag.

(2) Since it is used in a horizontal state or an inclined state, the fluctuation of the molten metal level is large, and the indirect molten metal level detection cannot accurately follow the descent level of the rake plate.

The present invention solves the above-mentioned problems and can reliably remove slag even in a branch gutter in an inclined state, and accurately follows the fluctuation of the rake plate even when the fluctuation of the rake plate is large. An object of the present invention is to provide a skimming device for a branch gutter that can be used.

Means for Solving the Problems In order to solve the above problems, the present invention provides a gutter body with hot water outlets on both left and right sides, and a slag scraping groove on the front part. A slag skimming device for a branch gutter capable of tapping from the tap outlet and tapping from one tap outlet while tilting to the left or right. A rake arm extending in the horizontal direction is provided on the dolly so as to be vertically swingable, and a rake plate whose lower side is perpendicular to the slug scraping direction and extends in the horizontal direction is vertically movable at the tip of the rake arm. The rake is provided so as to be swingable around the scraping direction, and a molten metal level detection sensor is provided at the lower end of this rake plate.

Action In the above configuration, the carriage is moved forward and lowered from above the branch gutter, and the lower end of the rake plate is stopped at a position where the molten metal surface detection sensor detects contact with the molten metal surface, and the carriage is moved backward to move the rake plate. Move to the slag scraping groove side. Thereby, the slag floating on the molten metal surface of the branch gutter can be scraped out to the slag scraping groove. Moreover, even if the branch gutter is tilted to the left or right, and tapping water to only one of the hot water outlets, the rake corresponds to the bottom of the slag scraping groove that tilts to the left or right. Since the plate follows the swing and the lower side slides over the entire width by its own weight, there is no gap between the bottom of the slag scraping groove and the lower side of the rake plate, and the slag can be scraped out reliably.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. The same members described in the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 3 and 4, this skimming device 21
Is provided with a pair of left and right guide rails 25 on a turning table 24 rotatably supported on a pedestal 22 about a vertical turning shaft 23, and a movable carriage 26 is arranged on these guide rails 25. Has been done. This dolly 26 has a support pillar 27 at the rear.
The base end of a rake arm 28 extending forward is supported on the upper end of the support column 27 via a horizontal pin 29 so as to be vertically swingable. A swing cylinder 30 in which a large stroke swing cylinder 30a and a small stroke swing cylinder 30b are joined in a double rod shape is connected between the swing table 24 and the pedestal 22.
By a, the rake arm 28 is swung from the standby position (a) to the working position (b) via the carriage 26, and the swing cylinder 30b displaces the rake arm 28 at the working position (b) in correspondence with the slug scraping position. Let Swivel table 24
Above is a scraping cylinder for driving the cart 24.
31 is provided to move the rake arm 28 forward and backward through the carriage 26. Rake arm 28 in front of trolley 26
Is lifted from below, and an up-and-down jack 32 for vertically swinging the rake arm 28 is erected. Reference numeral 33 is a cable carrier for connecting the drive source supply cable and the signal cable to the carriage 26.

The rake arm 28 includes a first arm 28a on the base end side and a second arm 28b detachably attached to the first arm 28a via a connecting member 28c. As shown in FIG. 1, an attachment tool 35 having an inverted L-shape and a receiving plate portion 34 whose base end side is inclined downward at the rake arm is fixed to the tip end portion of the second arm 28b. A rake plate 36 is attached to the portion 34 so as to be able to move up and down and swing around the slag scraping direction. That is, as shown in FIG. 2, a pair of left and right elongated holes 37A and 37B having a wide bottom portion are formed in the receiving plate portion 34 so as to be widened inward, and the receiving plate portion 34 is slidable by sandwiching the same. Between the rake plate 36 on the rake arm base end side and the holding plate 38 on the rake arm tip end side, slide pins 39 movably penetrating through the long holes 37A, 37B are connected and fixed, respectively. Therefore, as shown in FIG. 2, the rake plate 36 at the lower limit position due to its own weight has the slide pin 39 at the lower end of the long holes 37A, 37B,
A lower side scraping end 36a of the rake plate 36 in a direction orthogonal to the slag scraping direction A is located along the horizontal direction. And
As shown by a phantom line, even if the contact surface of the lower side scraping end 36a (this corresponds to the slanted bottom wall 9a and the horizontal bottom wall 9b of the slag scraping groove 9) is slanted, the slide pin 39 is formed. Has a long hole 37
There is no gap between the contact surface and the contact surface. The rake plate 36 includes a detection end 40a.
A contact sensor (an example of a molten metal surface detection sensor) 40 exposed on the side of the lower side scraping end 36a is arranged in a through hole 41 in the vertical direction, and the rake plate 36 accurately detects the slag scraping position for undulating. Control the jack 32. 40b is a lead wire of the contact sensor 40.

Next, the slag removing work by the skimming device 21 will be described.

As shown in FIG. 5, the operation is performed on the control panel operation panel (not shown), and the power is turned on, the origin is returned, and the automatic skimming is performed in this order. After confirming whether power is normally applied on the operation panel (S-1), the select switch of the operation power is turned on (S-2). If each operation of the device is not at the home position, the home return is instructed. Then, it is operated according to the flowchart. Here, the rake indicates the rake arm 28 and the rake plate 36. Further, the turning indicates the turning (S-4, S-16) of the turning table 24 by the turning cylinder 30a,
The turning indicates turning (S-5, S-11) by the swing cylinder 30b.

In the above embodiment, the rake plate 36 is provided with the long holes 37A and 37B.
However, the rake plate may be rotatably supported via the pin, and the pin may be liftably supported via a slide rail or the like.

As described above, according to the present invention, since the rake plate is provided at the tip of the rake arm so as to be able to move up and down and swing around the slag scraping direction, the slag scraping groove that tilts together with the branch gutter. The rake plate is inclined by its own weight to the bottom of the rake plate and slides over the entire width, so there is no gap between the rake plate and the bottom of the slag scraping groove, and the slag floating in the molten metal is removed from the slag scraping groove. You can surely scrape. Further, since the molten metal contact sensor is provided at the lower end of the rake plate, even if the molten metal level fluctuates significantly, the molten metal level is reliably detected and the lowered position of the rake plate is accurately controlled. be able to.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a side view of a rake plate mounting portion, and FIG. 2 is I shown in FIG.
-I arrow view, FIG. 3, FIG. 4 is a side view and a plan view of the skimming device, FIG. 5 is a flow chart showing the operation of the skimming device, FIG. 6 to FIG. 6 and 7 are a cross sectional view and a plan view of the branch gutter,
8 and 9 are horizontal and vertical cross-sectional views showing a usage state of the branch gutter, and FIG. 10 is a usage state diagram of the rake plate. 2 ... Branch gutter, 9 ... Slag scraping groove, 9a ... Sloping bottom wall,
9b ... Horizontal bottom wall, 21 ... Skimming device, 22 ... Stand, 24
…… Turning table, 26 …… Car, 28 …… Rake arm,
29 …… Horizontal pin, 30 …… Swivel cylinder, 31 …… Scraping cylinder, 32 …… Rising and lowering jack, 34 …… Receiving plate, 35…
… Mounting fixture, 36 …… rake plate, 36a …… Lower side scraping end, 37A, 37B …… Oval hole, 39 …… Slide pin, 40 …… Contact sensor.

Front page continuation (72) Inventor Akira Kawamoto 5-3-28 Nishi Kujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. Issue Hitachi Shipbuilding Co., Ltd. (56) References Japanese Patent Publication No. 51-45 (JP, B2) Jpn. 1-105069 (JP, Y2)

Claims (1)

[Claims] 1. A gutter body is provided with hot water outlets on both left and right sides, and a slag scraping groove is provided on the front part so that the gutter body can be boiled out from both hot water outlets in a horizontal state and inclined to the left or right side. Is a slag skimming device for branch gutters that can be tapped from only one of the hot water outlets.A trolley that can move in the front-rear direction and that can swivel is provided on a gantry. At the tip of the rake arm, a rake plate whose lower side is perpendicular to the slag scraping direction and extends horizontally is swingably mounted around the rake scraping direction. A slag skimming device for a branch gutter, characterized in that a bath surface detection sensor is provided at the lower end of the plate.