JPH0231626B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a molten metal drawing device provided at a tapping port for drawing molten metal from a tilting furnace that stores molten metal including aluminum alloy and other metals. .

(Prior Art) As an example of a conventional tilting furnace, as shown in FIG.
is provided protrudingly, supported by pivots 5, 5 on bearings 4, 4 fixed on the floor, and a spout 6 is opened between both brackets 3, 3 of the front wall 2 to drive a cylinder (not shown), etc. It is designed to be tilted by force, and tilting furnace 1
By tilting the molten metal, the molten metal flows out from the outlet 6. As shown in Figure 2, the flowing molten metal is received by an induction trough 7 extending from below the tap 6 and sent to, for example, a casting machine (not shown), during which time the flow rate is controlled by raising and lowering a float. A hot water level adjusting device 8 is interposed therebetween.

By the way, in the case of the conventional molten metal guiding device for the tilting furnace described above, an induction gutter is provided below the tap, so there is a head difference between the tap and the induction gutter, and there is also a head difference in the molten metal level adjustment device. Because of this difference in head, the molten metal flows down like a waterfall, creating turbulent flow at the falling part of the waterfall. This waterfall and turbulence oxidized the molten metal, and had the disadvantage that oxides and other impurities were mixed into the molten metal. Ceramic filters are used to remove oxides and impurities, but they clog quickly and require constant maintenance, which is a hassle.

(Objective of the Invention) This invention was devised to eliminate the above-mentioned conventional drawbacks, and allows the molten metal to flow out smoothly without causing waterfalls or turbulence when flowing out from the tilting furnace. An object of the present invention is to provide a molten metal guiding device for a tilting furnace.

(Structure of the Invention) The molten metal drawing device for a tilting furnace according to the present invention has a front wall rotatably supported on a pivot parallel to the front wall,
It is a tilting furnace with a tap opening in the center of the front wall, with a tapping gutter with an open front end protruding from the tap opening, and an open opening at the base end of the guide gutter at the open end of the tap tap. The shafts are connected to each other so as to be rotatable about the extension line of the longitudinal core of the pivot shaft.

(Example) As shown in Fig. 3, the tilting furnace 1 has brackets 3, 3 protruding from both sides of the front wall 2, and a pivot 5 is attached to the bearings 4, 4 fixed on the floor, as in the conventional one. ，
5, and a spout 6 is opened in the center of the front wall 2. A tap water tap 9 whose front end is open from the tap tap 6 is provided so as to protrude so that the tip of the tap tap 9 intersects with the axis extension line 10 of the pivot shaft 5, as shown in FIGS. 5 and 6. And the hot water gutter 9
The proximal open opening of the guide trough 7 is rotatably connected to the distal end of the guide trough 7 about the axis extension line 10 of the pivot shaft 5.
There is an example embodiment.

In the example shown in FIGS. 7 and 8, a support roll 11 having a circular cross section is attached to the tip of the bottom of the tap water gutter 9 integrally or integrally with the bottom, and the axial length of the roll 11 is set at a pivot point 5.
A groove 12 is provided on the lower surface of the proximal open opening of the guide trough 7, into which the upper arcuate surface of the support roll 11 fits, and the groove 12 is aligned with the axial long core extension line 10 of the support roll 11. It is engaged with the upper part. Further, both side walls of the guide gutter 7 are in sliding contact with the inner surfaces of both side walls of the tapping gutter 9.

In the example shown in FIGS. 9 and 10, an engagement roll 13 having a circular cross section is integrally or integrally disposed on the lower surface of the proximal open opening of the guide trough 7 in a state perpendicular to the longitudinal direction of the guide trough 7. A concave groove 14 into which the lower arcuate surface of the engagement roll 13 fits is provided at the bottom end of the open end of the tap water gutter 9, such that the center of the arc formed by the concave groove 14 is an extended line of the longitudinal axis of the pivot shaft 5. Provided in a state located above 10,
The engaging roll 13 is fitted into the groove 14, and the outer surfaces of both side walls of the guide gutter 7 are slidably in contact with the inner surfaces of both side walls of the tapping gutter 9.

If the molten metal is an aluminum alloy, the tapping trough 9, the guiding trough 7, the support roll 11, or the engagement roll 13 should be made of cast iron, which is easy to remove, or made of graphite or marinite (trade name, silicic acid refractory) on cast iron. It is formed by coating it with a refractory material such as Furthermore, if the molten metal is made of aluminum alloy, there is no risk of leakage even if there is a slight gap between the sliding surfaces of the tapping gutter 9 and the guiding gutter 7, but the sliding surfaces may be sealed. . Furthermore, as shown in FIG. 4, a float 15 is provided in the middle of the induction trough 7, the height of the molten metal is detected by a limit switch 16, and the tilting angle of the tilting furnace 1 is adjusted based on the detection signal to control the amount of molten metal flowing out. It's starting to be controlled.

When molten metal flows out from the tilting furnace 1 having the above structure, the tilting furnace 1 can be tilted in the same way as before, but the connecting part of the induction trough with the tapping trough remains in a fixed position without vertical displacement. The molten metal is held in the tap gutter 9
From there, it flows into the guide trough 7 as shown in FIG. 4, and flows down in one direction.

(Effects of the Invention) The molten metal drawing device for a tilting furnace according to the present invention has an opening at the base end of the induction trough attached to an open end at the tip of the tapping trough protruding from the front wall of the tilting furnace, and a pivot supporting the tilting furnace. The induction gutter is connected so as to be able to rotate around the axial long core extension line, and the induction gutter is connected to extend from the outlet gutter without any difference in level, so the molten metal flows smoothly into the induction gutter without causing waterfalls or turbulence. It is something that flows into the world. In addition, the induction gutter is rotatably connected to the tapping gutter as described above around the extended line of the axis of the pivot, and the support height of the induction gutter is always kept constant, so it can be adjusted according to the tilting angle of the tilting furnace. This makes it possible to reliably control the amount of molten metal flowing out.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a conventional tilting furnace, FIG. 2 is a sectional view showing a conventional molten metal guiding device, and FIG. 3 is a perspective view showing a tilting furnace equipped with a molten metal guiding device according to the present invention. Figure 4 is a cross-sectional view showing the state of molten metal flowing out, Figure 5 is a plan view showing the molten metal drawing device, Figure 6 is a cross-sectional view, and Figure 7 is an enlarged view showing the connection structure between the tapping gutter and the guiding gutter. 8 is a perspective view, FIG. 9 is an enlarged sectional view showing another connection structure between the tapping gutter and the guide gutter, and FIG. 10 is an exploded perspective view. DESCRIPTION OF SYMBOLS 1...Tilting furnace, 2...Front wall, 5...Pivot, 6...Tap spout, 7...Induction gutter, 9...Tap gutter, 10...Long axis extension line of pivot, 11...Support roll, 12...Groove, 13
... Engagement roll, 14... Concave groove, 15... Float.

Claims (1)

[Claims] 1. A tilting furnace 1 in which a front wall 2 of the furnace body is rotatably supported on a pivot 5 parallel to the front wall 2, and is provided protruding from a tap hole 6 formed in the front wall 2 of the furnace 1. The proximal open mouth of the guide gutter 7 is connected to the open end of the tap water gutter 9 so as to be rotatable about the axial long core extension line 10 of the pivot shaft 5. A molten metal guiding device for a tilting furnace, characterized in that the proximal open opening of an induction trough 7 is communicated with the molten metal guiding device.