JP5406754B2 - Molten metal supply device and molten metal storage method - Google Patents

Description

  The present invention relates to a molten metal supply device that supplies a molten metal to a molten metal supply destination after the molten metal generated by a metal melting furnace is sucked and stored with a negative pressure, and a molten metal storage when the molten metal is stored in the molten metal supply device. Regarding the method.

  In order to improve energy efficiency, a large amount of molten metal is intensively produced using a large melting furnace. In this case, the molten metal produced in a large melting furnace is generally used at a casting site after being transferred to a small furnace such as a crucible in order to clean the molten metal and improve work efficiency. Here, when supplying molten metal from a large melting furnace to a small furnace, a method using a container for supplying molten metal called “Toribe” (referred to as a first molten metal supply method), a large melting furnace and a small furnace There is a method in which the molten metal is poured from a large melting furnace into a small furnace by connecting them with scissors (referred to as a second molten metal supply method).

  The first molten metal supply method is suitable for the case where the large melting furnace is far from the small melting furnace. After the molten metal from the large melting furnace is pumped up by the handle and stored in the ladle, it is dedicated to cranes, etc. It is transferred to the small furnace by the transfer means and transferred from the ladle to the small furnace.

  However, since this first molten metal transfer method needs to pump up the molten metal of the large melting furnace with the handle, it is necessary to make a large opening surface (melted water outlet) of the large melting furnace. For this reason, there is a problem that the amount of heat released from the opening surface of the large melting furnace increases and the temperature of the molten metal decreases. There is a problem of getting worse. In addition, since the pump is pumped out by the handle, there is a problem in that work efficiency is poor and it takes a long time to supply the molten metal to the small furnace.

  On the other hand, the second molten metal supply method is suitable when the large melting furnace and the small melting furnace are relatively close to each other. For example, the molten metal discharge port of the large melting furnace, the molten metal inlet of the small furnace, The two are connected with a scissors, and the molten metal of the large melting furnace is poured into the small furnace. In this second molten metal transfer method, the molten metal discharge port of the large melting furnace is closed with a triangular pyramid shaped plug (called a tap) formed of ceramic or the like except when the molten metal of the large melting furnace is poured into the small furnace. When the molten metal is poured from the large melting furnace into the small furnace, the tap is removed and the molten metal of the large melting furnace is poured into the small furnace.

  However, the second molten metal supply method has a problem that a part of the molten metal may be solidified and deposited at the molten metal discharge port of the large melting furnace, thereby preventing the molten metal from being discharged smoothly. In addition, there is a problem that the molten metal discharge port is lost when opening and closing with the tap. If the molten metal discharge port is lost, the reliability of the clogged state is reduced, and the tap is inserted even though the tap is inserted. Otherwise, there is a risk that the molten metal will not be able to stop spilling, which can lead to a major accident.

  In order to avoid these problems, various molten metal supply devices have been proposed in the past for sucking and storing molten metal generated in a large melting furnace or the like with negative pressure and then supplying the molten metal to a molten metal supply destination. (For example, refer to Patent Documents 1 and 2.)

  The molten metal supply apparatus (referred to as the first prior art) disclosed in Patent Document 1 uses a molten metal storage chamber of the molten metal supply apparatus to have a negative pressure so that a molten metal generated in a large melting furnace or the like is supplied from a molten metal suction / discharge port. When a predetermined amount of molten metal is sucked, the molten metal suction / discharge port is closed by a shield plate by driving of the cylinder rod to prevent leakage of the stored molten metal. When discharging the molten metal stored in the molten metal storage chamber, an inert gas or the like is allowed to flow into the molten metal storage chamber, and the shield plate is driven by the cylinder rod to open the molten metal suction / discharge port, and then supply the molten metal. Discharge.

  On the other hand, the molten metal supply apparatus (referred to as the second conventional technique) disclosed in Patent Document 2 connects a conduit portion having an inverted V shape to a molten metal storage chamber of the molten metal supply apparatus, and the tip end portion of the conduit portion is large-sized. It is immersed in the molten metal generated in the melting furnace, and the molten metal is sucked by using the molten metal storage chamber as a negative pressure. Further, the conduit portion functions for discharging the molten metal when discharging the molten metal stored in the molten metal storage chamber.

  In the second prior art, since the conduit portion has an inverted V shape, it is possible to prevent the molten metal stored in the molten metal storage chamber from flowing backward naturally, such as a cylinder rod or a shielding plate as in the first prior art. A complicated movable mechanism is unnecessary. In addition, when discharging the molten metal stored in the molten metal storage chamber, an inert gas or the like is caused to flow into the molten metal storage housing, and the molten metal is discharged from the conduit portion by increasing the pressure of the molten metal storage chamber.

JP 2009-39964 A JP-A-11-188475

  Both the first conventional technique and the second conventional technique enable the molten metal stored in the molten metal storage casing to be conveyed without leaking from the molten metal storage casing. However, the first prior art requires a complicated movable mechanism such as a cylinder rod and a shielding valve driven by the cylinder rod as a mechanism for sucking and discharging the molten metal, and the configuration of the entire molten metal supply device is complicated. Therefore, it is necessary to perform maintenance frequently so that the movable mechanism can always operate normally.

  In particular, since a very high temperature molten metal is stored in the molten metal storage chamber, a malfunction of the movable mechanism occurs due to the movable mechanism being directly exposed to the high temperature molten metal or the molten metal adhering to the movable mechanism. Cheap. For this reason, it is preferable not to provide a movable mechanism etc. in the molten metal storage chamber of a molten metal supply apparatus as much as possible, and it is preferable to set it as simple as possible.

  According to the second prior art, a movable mechanism or the like is not particularly required in the molten metal storage chamber, the hot water can be stored in the molten metal storage chamber, and the stored molten metal can be held without leaking. Compared to, the configuration is simple. However, in the second prior art, since the conduit portion for sucking and discharging the molten metal has an inverted V shape, the molten metal may not be sucked smoothly. In addition, when the molten metal is discharged, The molten metal tends to remain in the conduit and in the molten metal storage chamber.

  In particular, if the molten metal remains in the conduit and the molten metal storage chamber, the quality of the remaining molten metal cannot be denied, and if the remaining molten metal is present, the next molten metal is sucked and mixed with the deteriorated molten metal. If this is repeated, the quality of the molten metal may be further deteriorated. For this reason, it is necessary to frequently clean the inside of the conduit and the molten metal storage chamber, but if the conduit is in an inverted V shape, cleaning the inside of the conduit is not easy.

  Therefore, the present invention provides a molten metal supply device that can safely and reliably transport the stored molten metal without providing a complicated movable mechanism in the molten metal storage chamber, and that is easy to maintain. An object of the present invention is to provide a molten metal storage method capable of appropriately storing molten metal.

  [1] A molten metal supply apparatus of the present invention is a molten metal supply apparatus that sucks and stores molten metal generated by a melting furnace with a negative pressure, and supplies the stored molten metal to a molten metal supply destination, and stores the sucked molten metal. A molten metal storage chamber having a molten metal discharge portion provided at a tip portion thereof, and an upper end portion of the molten metal storage chamber and the molten metal discharge port for discharging the stored molten metal to the outside; A molten metal introduction pipe that penetrates the bottom of the storage housing and is attached to the molten metal storage housing, guides the molten metal to the molten metal storage chamber, and a rotational force that moves the molten metal outlet upward or downward. A rotating mechanism for applying to the molten metal storage casing, and the molten metal stored in the molten metal storage chamber in a state where the molten metal storage casing is in an upright posture is stored at a position immediately before starting to flow out from the molten metal discharge port. When the upper limit position is assumed , The melt introduction pipe, the upper end, characterized in that the are the mounted on the molten metal reservoir housing so that the molten metal reservoir upper limit position and the same position or slightly lower position.

  According to the molten metal supply apparatus of the present invention, the stored molten metal can be transported safely and reliably without providing a complicated movable mechanism in the molten metal storage chamber. That is, the molten metal supply apparatus of the present invention can easily return a part of the molten metal sucked into the molten metal storage chamber by having the above-described configuration, whereby the surface of the molten metal stored in the molten metal storage chamber (horizontal plane). ) Can be lower than the upper end opening of the molten metal introduction pipe. For this reason, if the molten metal supply device is transported while the molten metal storage housing is kept in the upright posture, the stored molten metal can be transported safely and reliably without leaking the stored molten metal. Moreover, since the molten metal supply apparatus of the present invention has a simple structure, maintenance can be facilitated and a molten metal supply apparatus that can withstand long-term use can be obtained.

  [2] In the molten metal supply apparatus of the present invention, it is preferable that the molten metal discharge portion has a short cylindrical shape and is provided so as to protrude outward from the outer surface of the molten metal storage casing.

  Thereby, when discharging a molten metal from a molten metal discharge part, a molten metal can be discharged | emitted smoothly and a molten metal can be prevented from remaining in a molten metal discharge part.

  [3] In the molten metal supply apparatus of the present invention, it is preferable that the molten metal introducing pipe is a straight pipe.

  By making the molten metal introduction pipe a straight pipe, the flow of molten metal becomes smooth when the molten metal is sucked, and the molten metal can be sucked efficiently, and it is difficult for the molten metal to adhere to the inside of the molten metal introduction pipe. The maintenance of the molten metal introduction pipe can be facilitated.

  [4] In the molten metal supply apparatus of the present invention, at least the side wall surface on the side where the molten metal discharge portion is present out of the side wall surface of the previous molten metal storage chamber is located closer to the upper portion of the molten metal storage chamber. It is preferable that it becomes the inclined surface which inclines in the direction which goes to.

  Since the side wall surface of the molten metal storage chamber has such an inclined surface, when the molten metal stored in the molten metal storage chamber is discharged from the molten metal discharge portion, the molten metal supply device is stored in the molten metal storage chamber with an inclination of 90 degrees or less. The molten metal can be discharged reliably, and the remaining of the molten metal can be reduced as much as possible.

  [5] In the molten metal supply apparatus of the present invention, the rotating mechanism stores the molten metal so that the molten metal storage casing can maintain an upright posture with its own weight when no rotational force is applied to the molten metal storage casing. It is preferable to support the housing.

  As described above, in a normal state, that is, in a state where no rotational force is applied to the molten metal storage casing, the molten metal storage casing maintains an upright posture, and therefore only when the molten metal storage casing needs to be rotated. It is only necessary to operate the rotation mechanism, and the rotation mechanism can be simplified.

  [6] A molten metal storage method according to the present invention is a molten metal storage method for storing molten metal in the molten metal supply device according to [1], wherein the molten metal storage casing is held in an upright position. At least a predetermined amount of the molten metal storage casing so that the molten metal discharge port moves upward after releasing the negative pressure. The molten metal sucked into the molten metal storage chamber, a molten metal returning process for returning a part of the molten metal sucked into the molten metal storage chamber from the molten metal introducing pipe to the melting furnace, and the molten metal storage casing standing upright after completion of the molten metal returning process A molten metal storage housing posture returning step for returning the molten metal storage housing posture to the posture.

  By sequentially performing such steps, the stored molten metal can be transported safely and reliably without providing a complicated movable mechanism in the molten metal storage chamber. That is, according to the molten metal supply method of the present invention, a part of the molten metal sucked into the molten metal storage chamber can be easily returned, whereby the position of the surface (horizontal plane) of the molten metal stored in the molten metal storage chamber is The position can be lower than the upper end opening of the introduction pipe. For this reason, if the molten metal supply device is transported while the molten metal storage housing is kept in the upright posture, the stored molten metal can be transported safely and reliably without leaking the stored molten metal.

It is sectional drawing for demonstrating the structure of the molten metal supply apparatus 10 which concerns on embodiment. It is a figure explaining the rotation mechanism. It is a figure for demonstrating the molten metal storage method using the molten metal supply apparatus 10 which concerns on embodiment. It is a figure for demonstrating the molten metal supply method using the molten metal supply apparatus 10 which concerns on embodiment. It is a figure explaining the molten metal supply apparatus 20 as a modification of the molten metal supply apparatus 10. FIG. It is a figure explaining the molten metal storage method using the molten metal supply apparatus. It is a figure explaining the molten metal discharge method using the molten metal supply apparatus.

Hereinafter, embodiments of the present invention will be described.
Drawing 1 is a sectional view for explaining the composition of molten metal supply device 10 concerning an embodiment. A molten metal supply apparatus 10 according to the embodiment stores a molten metal storage casing 100 having a molten metal storage chamber 110 and a molten metal 700 (see FIG. 3) such as aluminum generated in a melting furnace 500 (see FIG. 3). And a rotating mechanism 300 (see FIG. 2) that rotates the molten metal storage casing 100 by a predetermined amount in the direction of the arrow xx ′ from the upright posture. Yes. The upright posture of the molten metal storage housing 100 is assumed to be a posture in which the central axis (shown by a one-dot chain line) in the molten metal storage housing 100 is along the vertical line V (shown by a broken line). In addition, the molten metal introduction pipe 200 is attached to the molten metal storage casing 100 so that the central axis thereof coincides with the central axis y of the molten metal storage casing 100.

  The molten metal storage housing 100 is capable of opening and closing a short cylindrical molten metal discharge part 120 that discharges the molten metal stored in the molten metal storage chamber 110 to the outside, and a front end opening (referred to as a molten metal discharge port) 121 of the molten metal discharge part 120. It has a cover 130 for the molten metal discharge port to cover and a cover 150 for the molten metal storage casing that covers the opening surface 140 of the molten metal storage casing 100. In addition, as a material of the molten metal storage housing | casing 100, it is preferable to use the member excellent in the heat resistance and durability which coated iron with ceramics, for example.

  The melt storage housing lid 150 is provided with an air suction port 160 connected to a negative pressure generating device (not shown). The air suction port 160 is connected to one end 171 of a U-shaped pipe 170 attached to the back surface (surface on the molten metal storage chamber 110 side) of the molten metal storage housing lid 150. The U-shaped pipe 170 is attached to the molten metal storage housing lid 150 so that the gap between the other end 172 and the back surface of the molten metal storage housing lid 150 is a slight gap. As described above, the interval between the other end 172 of the U-shaped pipe 170 and the back surface of the molten metal storage housing lid 150 is set to a slight gap when the molten metal is sucked from the melting furnace 500 under a negative pressure. This is to make it difficult for the molten metal to be sucked into the U-shaped pipe 170.

  The molten metal outlet lid body 130 is structured such that when the molten metal storage chamber 110 is in a negative pressure state, the molten metal outlet 110 is sucked toward the molten metal storage chamber 110 and seals the molten metal outlet 121. Such a structure can be realized by increasing the flatness of the contact surface between the molten metal discharge port lid 130 and the end of the molten metal discharge port 121. By adopting such a structure, the molten metal discharge port 121 can be sealed by the molten metal discharge port lid 130 at the time of suction by negative pressure without adopting a complicated opening / closing mechanism. In order to further improve safety, after the molten metal is stored in the molten metal storage chamber 110, the molten metal discharge lid 130 is fixed with a bolt, a screw, or the like so that the closed state is securely held. Also good. The molten metal storage housing lid 150 is fixed to the molten metal storage housing 100 with bolts or screws.

  Moreover, as for the molten metal storage chamber 110, the side wall surface 111 by the side in which the molten metal discharge part 120 is provided among the side wall surfaces becomes an inclined surface. That is, the side wall surface 111 is an inclined surface that inclines in a direction toward the outside of the molten metal storage chamber 110 from the bottom surface 112 of the molten metal storage chamber 110 to the upper part of the molten metal storage chamber 110. Such an inclined surface may be provided on the entire side wall surface of the molten metal storage chamber 110, but may be provided only on the side wall surface 111 on the side where the molten metal discharge portion 120 is provided. In addition, in the molten metal supply apparatus 10 which concerns on embodiment, the example by which the whole side wall surface of the molten metal storage chamber 110 is an inclined surface is shown.

  The molten metal introduction pipe 200 is attached to the molten metal storage casing 100 such that the upper end portion 210 passes through the bottom 101 of the molten metal storage casing 100 and is positioned at a predetermined height h from the bottom surface 112 of the molten metal storage chamber 110. . When the molten metal is sucked, the lower end portion 220 of the molten metal introduction pipe 200 is immersed in the molten metal generated in the melting furnace 500 (see FIG. 3). In addition, it is preferable that the molten metal introduction pipe 200 is manufactured using a member having excellent heat resistance and durability, as with the molten metal storage casing 100.

  The height h of the upper end portion 210 of the molten metal introduction pipe 200 is such that when the molten metal storage casing 100 is in an upright posture and the molten metal stored in the molten metal storage chamber 110 is in a stationary state, The height is set so as not to flow out of the molten metal discharge port 121 of the molten metal discharge unit 120. For example, the position is the same as or slightly lower than a straight line H1 (indicated by a two-dot chain line in FIG. 1) along the horizontal direction passing through the lower end portion 121a of the molten metal discharge port 121.

  FIG. 2 is a diagram for explaining the rotation mechanism 300. 2A is an external side view of the molten metal supply device 10, and FIG. 2B is a front view of FIG. 2A viewed from the direction of arrow A. The rotation mechanism 300 includes a suspension fitting 310 for suspending the molten metal storage housing 100 and two horizontal shafts 320 and 330 (a first horizontal shaft 320 and a second horizontal shaft 330) fixed to the outer surface of the molten metal storage housing 100. And a handle 340 for applying a rotational force to the first horizontal shaft 320.

  The hanging metal fitting 310 has a shape obtained by rotating the “U” shape by 90 degrees counterclockwise. Two bearing portions 313 and 314 that rotatably support the horizontal shaft 330 are provided. The hanging bracket 310 is fixed to, for example, a crane (not shown) by a fixing bracket 350, so that the two support pieces 311 and 312 can move while maintaining a state along the vertical direction. Yes. The bearing portions 313 and 314 are provided with ball bearings (not shown). Therefore, the first horizontal shaft 320 and the second horizontal shaft 330 can be smoothly rotated at the bearing portions 313 and 314.

  The first horizontal axis 320 and the second horizontal axis 330 fixed to the molten metal storage casing 100 are orthogonal to the vertical plane including the center of the molten metal outlet 121 and the central axis y, and the molten metal storage casing 100. Are fixed at positions facing each other across the molten metal storage casing 100 on a straight line orthogonal to the central axis y.

  Further, the first horizontal axis 320 and the second horizontal axis 330 are located in the height direction of the molten metal storage casing 100 more than the center-of-gravity position of the entire component composed of the molten metal storage casing 100 and the molten metal introduction pipe 200. High position. For this reason, the molten metal storage housing | casing 100 hold | maintains the state of an upright posture with dead weight in the state in which the rotational force is not given by the rotation mechanism 300. FIG. Further, in a state where the molten metal is put in the molten metal storage chamber 110, the molten metal storage casing 100 has a large weight due to the molten metal, and therefore, it is not easily tilted unless a rotational force is given by the rotating mechanism 300. .

  The handle 340 gives a rotational force to the molten metal storage casing 100, and when the handle 340 is rotated by a predetermined amount, the first horizontal shaft 320 also rotates with the rotation of the handle 340, thereby the molten metal storage casing 100 also. Rotate.

  In the example of FIG. 2, since the rotational force of the handle 340 is directly applied to the molten metal storage housing 100, that is, the handle 340 and the first horizontal shaft 320 are directly connected, For example, when the handle 340 is rotated clockwise by an angle of 20 degrees (arrow x direction), the molten metal storage casing 100 is also rotated clockwise by an angle of 20 degrees (arrow x direction). Note that the molten metal storage casing 100 rotates in the arrow x direction means that the molten metal discharge port 121 of the molten metal discharge unit 120 moves upward, and the molten metal storage casing 100 rotates in the arrow x ′ direction. That is, the molten metal discharge port 121 of the molten metal discharge unit 120 moves downward.

  Note that the mechanism for transmitting the rotational force from the handle 340 to the molten metal storage housing 100 is not limited to such a mechanism. For example, a reduction gear is interposed between the handle 340 and the first horizontal shaft 320. However, according to this, the molten metal storage housing 100 can be easily rotated only by rotating the handle 340 with a small force.

  Drawing 3 is a figure for explaining the molten metal storage method using molten metal supply device 10 concerning an embodiment. FIG. 3A is a view showing a molten metal suction process in which the molten metal 700 is sucked from the molten metal holding chamber 530 of the melting furnace 500 and stored in the molten metal storage housing 100, and FIG. It is a figure which shows the molten metal return process which returns the molten molten metal of the attracted molten metal to the molten metal holding chamber 530, and FIG.3 (c) is the attitude | position return process which returns the molten metal storage housing | casing 100 to the original attitude | position (upright attitude | position). FIG.

  The melting furnace 500 includes a burner 510, a melting chamber 520 that melts a charged metal to be melted by the heat of the burner 510 to generate a molten metal 700, and a molten metal holding chamber 530 that holds the generated molten metal 700. ing. Note that the melting furnace 500 is a large melting furnace capable of producing a large amount of molten metal as described above.

  In the molten metal storage method by the molten metal supply device 10 according to the embodiment, first, the lower end portion 220 of the molten metal introduction pipe 200 is immersed in the molten metal holding chamber 530 of the melting furnace 500 as shown in FIG. . In such a state, when the molten metal storage chamber 110 is brought into a negative pressure state by a negative pressure generating device (not shown), the molten metal held in the molten metal holding chamber 530 flows into the molten metal storage chamber 110 through the molten metal introduction pipe 200. Come.

  When the molten metal storage amount reaches the upper end portion 210 of the molten metal introduction pipe 200 in the molten metal storage chamber 110, that is, reaches the height h from the bottom surface 112 of the molten metal storage chamber 110 in FIG. Then, the negative pressure state is released, and the suction of the molten metal is finished (molten suction step).

  Note that the amount of molten metal stored in the molten metal storage chamber 110 can be determined by monitoring the suction time using a timer or the like, for example. That is, it is possible to know how much time the molten metal is stored after how many seconds elapses from the relationship between the approximate suckable amount per unit time (for example, per second) and the volume of the molten metal storage chamber 110. it can. The control of the negative pressure generating device by the timer may be performed by an operator, or the negative pressure generating device may be automatically stopped based on time information from the timer.

  Thus, when the amount of molten metal stored in the molten metal storage chamber 110 reaches the upper end portion 210 of the molten metal introducing pipe 200 (see FIG. 3A), the molten metal is stored as shown in FIG. The casing 100 is rotated from the upright posture so that the arrow x direction, that is, the molten metal discharge port 121 moves upward. The melt storage housing 100 is rotated by the rotation mechanism 300 shown in FIG. That is, when the handle 340 of the rotating mechanism 300 is rotated by a predetermined amount in the clockwise direction (arrow x direction) in FIG. 2A, the rotational force is applied to the molten metal storage casing 100, and the molten metal storage casing 100 is also arrowed. Rotate by a predetermined amount in the x direction. Thereby, the central axis y of the molten metal storage casing 100 is inclined with respect to the vertical line V by a predetermined angle in the arrow x direction.

  As shown in FIG. 3B, when the molten metal storage casing 100 is inclined by a predetermined angle in the direction of the arrow x with respect to the vertical line V, a part of the upper end portion 210 of the molten metal introducing pipe 200 (FIG. The right end portion 210 a) in b) is lower than the surface (horizontal plane) L of the molten metal, and the molten metal flows into the upper end portion 210 of the molten metal introducing pipe 200, and the molten molten metal passes through the molten metal introducing pipe 200. Returning to the holding chamber 530 (molten metal returning step).

  Then, when the molten metal returns to the molten metal holding chamber 530 until the surface (horizontal plane) L of the molten metal coincides with the right end portion 210a of the molten metal introducing pipe (see FIG. 3B), the return of the molten metal stops, and the molten metal returning step is performed. finish. When the molten metal returning process is completed, the molten metal storage casing 100 is rotated in the direction of the arrow x ′, and the molten metal storage casing 100 is returned to the upright posture as shown in FIG. 3C (posture returning process). Thereby, as shown in FIG. 3C, the surface L of the molten metal in the molten metal storage casing 100 slightly decreases and becomes a position lower than the upper end portion 210 of the molten metal introduction pipe 200. In FIG. 3C, it is lower than the upper end portion 210 of the molten metal introduction pipe 200 by Δh.

  Note that the amount of molten metal returned to the molten metal holding chamber 530 (referred to as molten metal return amount) varies depending on the inclination angle in the direction of the arrow x with respect to the vertical line V of the molten metal storage casing 100. That is, if the inclination angle in the direction of the arrow x with respect to the vertical line V is increased, the amount of molten metal returned increases. This molten metal return amount can be set to an optimal amount appropriately depending on the type of conveying means for conveying the molten metal supply device 10 to the small furnace 600 (see FIG. 4). For example, when transporting by means of transport with little shaking, the amount of molten metal returned should be as small as possible, and when transported by means of transport with relatively large shaking, the amount of molten metal returned should be avoided to prevent leakage of molten metal due to shaking. Set a little more.

  As shown in FIG. 3 (c), when the amount of the molten metal in the molten metal storage casing 100 is lower than the upper end portion 210 of the molten metal introduction pipe 200, the molten metal is maintained as long as the molten metal supply device 10 is in an upright posture. Does not flow out from the molten metal introduction pipe 200, and the amount of the molten metal in the molten metal storage chamber 110 is maintained. Therefore, if the molten metal supply device 10 is conveyed by the conveying means (not shown) while maintaining the upright posture state shown in FIG. 3C, the small furnace while maintaining the amount of the molten metal in the molten metal storage chamber 110. Up to 600 can be conveyed.

  FIG. 4 is a diagram for explaining a molten metal supply method using the molten metal supply apparatus 10 according to the embodiment. FIG. 4A is a view showing a state in which the molten metal supply device 10 has been conveyed to the small furnace 600, and FIGS. 4B and 4C are molten metal discharge processes for discharging the molten metal to the small furnace 600. FIG. FIG. 4B shows a state where the molten metal discharge is started in the molten metal discharging process, and FIG. 4C shows a state where the molten metal discharge is finished in the molten metal discharging process.

  As shown in FIG. 4A, in the state where the molten metal supply apparatus 10 is conveyed to the small furnace 600 by the conveying means, as shown in FIG. 4B, the rotating mechanism 300 (see FIG. 2 for details). When the molten metal storage housing 100 is rotated in the direction of the arrow x ′, the molten metal stored in the molten metal storage chamber 110 flows out from the molten metal discharge port 121 of the molten metal discharge unit 120 to the small furnace 600.

  And the molten metal storage housing | casing 100 is further rotated in the arrow x 'direction, and as shown in FIG.4 (c), the center axis y of the molten metal supply apparatus 10 is 90 in the arrow x' direction with respect to the vertical line V. As shown in FIG. When tilted to a degree close to that, the molten metal stored in the molten metal storage chamber 110 flows out into the small furnace 600 without remaining in the molten metal storage chamber 110. This is because the side wall surface 111 on the side of the molten metal discharge portion 120 in the molten metal storage chamber 110 is inclined as described with reference to FIG. 1, and the molten metal storage casing 100 is set at 90 degrees with respect to the vertical line V. If tilted to a near tilt angle, the molten metal stored in the molten metal storage chamber 110 flows out into the small furnace 600 without remaining in the molten metal storage chamber 110.

  As described above, the molten metal supply apparatus 10 according to the embodiment includes the molten metal suction step (see FIG. 3A), the molten metal return step (see FIG. 3B), and the posture return step (FIG. 3C). ))), The position of the surface of the molten metal stored in the molten metal storage chamber 110 (the height from the bottom surface 112 of the molten metal storage chamber 110) is lower than the lower end 121a of the molten metal outlet 121, and The position can be lower than the upper end portion 210 of the molten metal introduction pipe 200. Thereby, if the molten metal supply apparatus 10 is conveyed in an upright posture, the molten metal stored in the molten metal storage chamber 110 can be safely and reliably conveyed to the small furnace 600 without leakage.

  Then, in the state where the molten metal supply device 10 is conveyed to the small furnace 600 by the conveying means (see FIG. 4A), the molten metal discharging step (FIG. 4B and FIG. 4) for discharging the molten metal to the small furnace 600. By performing (c), the molten metal stored in the molten metal storage chamber 110 can be discharged to the small furnace 600 without remaining in the molten metal storage chamber 110.

  Thus, according to the molten metal supply apparatus 10 which concerns on embodiment, the molten metal stored in the molten metal storage chamber 110 can be conveyed safely and reliably, without providing a complicated movable mechanism in the molten metal storage chamber 110, and The molten metal stored in the molten metal storage chamber 110 can be efficiently supplied to the small furnace 600.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the following modifications (1) to (4) are possible.

  (1) In the above embodiment, the molten metal storage amount in the molten metal storage chamber 110 is determined by determining the approximate suction amount from the suction time by a timer or the like, and the suction of the molten metal is stopped. If it can be set with high accuracy, it is not always necessary to perform the molten metal returning step. That is, if the time required for suctioning to the position of FIG. 3C is measured in advance and the suction is stopped when that time has elapsed, the amount of molten metal stored in the molten metal storage chamber 110 is always shown in FIG. ) Position.

  (2) The rotation mechanism 300 is not limited to the mechanism shown in FIG. 2, and various mechanisms can be adopted.

  (3) Although the bottom surface of the molten metal storage housing 100 is planar, it may not be planar, for example, hemispherical (saddle shape). Further, the shape of the molten metal storage housing 100 itself is not particularly limited, and for example, the entire molten metal storage housing 100 can be hemispherical.

  (4) Although the molten metal supply apparatus 10 is configured as shown in FIG. 1, it is not limited to such a configuration, and various modifications can be made.

  FIG. 5 is a diagram for explaining a molten metal supply apparatus (referred to as molten metal supply apparatus 20) as a modification of the molten metal supply apparatus 10. The difference between the molten metal supply device 20 shown in FIG. 5 and the molten metal supply device 10 shown in FIG. 1 is that the molten metal introduction pipe 200 also has a function as the molten metal discharge unit 120 in the molten metal supply device 10. That is, the lower end portion 220 of the molten metal introducing pipe 200 serves as a molten metal inlet when the molten metal is sucked, and serves as a molten metal outlet when discharging the molten metal stored in the molten metal storage chamber 110.

  Since the molten metal introduction pipe 200 has a function as a molten metal discharge unit, the molten metal supply device 20 does not require the molten metal discharge unit 120 provided in the molten metal storage casing 100 in the molten metal supply device 10. In the molten metal supply device 20, the same components as those in the molten metal supply device 10 are denoted by the same reference numerals.

  In the molten metal supply device 20, as shown in FIG. 5, the molten metal introduction pipe 200 is provided in the side wall of the molten metal storage housing 100. That is, the molten metal supply device 20 has a structure in which the molten metal introduction pipe 200 is embedded in a part of the side wall of the molten metal storage casing 100. A melt flow port 181 connected to the upper end portion 210 of the melt introduction pipe 200 is provided above the side wall (referred to as a melt introduction pipe embedment side wall 180) where the melt introduction pipe 200 is buried.

  Further, the molten metal storage chamber 110 has at least the molten metal introducing pipe burying side wall 180 as an inclined surface among the side wall surfaces. That is, the molten metal introducing pipe burying side wall 180 is an inclined surface that is inclined in a direction toward the outside of the molten metal storage casing 100 as it goes from the bottom surface 112 of the molten metal storage chamber 110 to the upper part of the molten metal storage chamber 110.

  In addition, the molten metal supply device 20 is also provided with a rotation mechanism (not shown) for rotating the molten metal storage housing 100. Note that when the molten metal supply device 20 discharges the molten metal to the small furnace 600, the lower end portion 220 of the molten metal introduction pipe 200 serves as a molten metal discharge port, and thus the molten metal discharge port, that is, the lower end portion 220 or the lower end of the molten metal introduction pipe 200. The rotating mechanism is configured to rotate the molten metal storage casing 100 by rotating the central axis y of the molten metal introducing pipe 200 in the direction of the arrow xx ′ with the portion close to the portion 220 as the rotation center.

  Even when the molten metal is stored using the molten metal supply device 20 configured as described above, an appropriate amount of the molten metal is stored in the molten metal storage chamber 110 by performing the molten metal suction process, the molten metal return process, and the posture return process, similarly to the molten metal supply apparatus 10. Can be stored.

  FIG. 6 is a diagram for explaining a storage method using the molten metal supply device 20. FIG. 6 is a diagram showing a state in which the posture return process is performed. That is, a molten metal suction process for sucking molten metal and storing it in the molten metal storage chamber 110, a molten metal returning process for returning excess molten metal from the sucked molten metal to the molten metal holding chamber 530, ) Is returned to the molten metal storage chamber 110, an appropriate amount of molten metal can be stored.

  In addition, the molten metal return process in the molten metal supply apparatus 20 is performed by slightly rotating in the arrow x direction around the lower end portion 220 of the molten metal introducing pipe 200 or a portion close to the lower end portion 220. As a result, the molten metal in the molten metal storage chamber 110 returns from the lower end portion 220 of the molten metal introduction pipe 200 to the molten metal holding chamber 530 through the molten metal introduction pipe 200.

  FIG. 7 is a diagram for explaining a molten metal discharge method using the molten metal supply device 20. When the molten metal supply device 20 storing the molten metal is conveyed to the small furnace 600 by the conveying means, the lower end portion 220 of the molten metal introducing pipe 200 is positioned above the opening surface 610 of the small furnace 600 as shown in FIG. State. And if the molten metal storage housing | casing 100 is rotated in the arrow x direction centering on the part near the lower end part 220 or the lower end part 220 of the molten metal introduction pipe 200 by a rotation mechanism (not shown), The molten metal stored in the molten metal storage chamber 110 flows out from the lower end portion 220 of the molten metal introduction pipe 200 to the small furnace 600.

  At this time, since the molten metal introducing pipe burying side wall 180 in the molten metal storage chamber 110 is an inclined surface, the molten metal storage casing 100 is inclined to an inclination angle close to 90 degrees with respect to the vertical line V (see FIG. 6). If inclined, the molten metal stored in the molten metal storage chamber 110 flows out to the small furnace 600 without remaining in the molten metal storage chamber 110.

  As described above, in the molten metal supply device 20, similarly to the molten metal supply device 10, the molten metal stored in the molten metal storage chamber 110 can be safely and reliably conveyed without providing a complicated movable mechanism in the molten metal storage chamber 110. In addition, the molten metal stored in the molten metal storage chamber 110 can be efficiently supplied to the small furnace 600.

  DESCRIPTION OF SYMBOLS 10,20 ... Molten supply apparatus, 100 ... Molten storage housing | casing, 110 ... Molten storage chamber, 120 ... Molten discharge part, 121 ... Molten discharge port, 130 ... Cover for molten metal discharge port Body, 140 ... opening surface, 150 ... lid for molten metal storage casing, 160 ... air suction port, 170 ... U-shaped pipe, 200 ... molten metal introduction pipe, 210 ... Upper end part, 220 ... lower end part, 300 ... rotating mechanism, 310 ... hanging bracket, 320 ... first horizontal axis, 330 ... second horizontal axis, 340 ... handle, 500 ..Smelting furnace, 600 ... small furnace, 700 ... molten metal

Claims (6)

A molten metal supply device that sucks and stores molten metal generated by a melting furnace with a negative pressure, and supplies the stored molten metal to a molten metal supply destination,
A molten metal storage chamber having a molten metal storage chamber for storing the sucked molten metal, and a molten metal discharge casing having a molten metal discharge port for discharging the stored molten metal to the outside;
A molten metal introduction pipe that passes through the bottom of the molten metal storage casing and is attached to the molten metal storage casing such that an upper end portion is located inside the molten metal storage chamber, and guides the molten metal to the molten metal storage chamber;
A rotation mechanism that applies a rotational force to the molten metal storage housing such that the molten metal discharge port moves upward or downward;
Have
When the position immediately before the molten metal stored in the molten metal storage chamber starts to flow out of the molten metal discharge port in the state where the molten metal storage casing is in the upright position is set as the molten metal storage upper limit position, the molten metal introduction pipe has the upper end The molten metal supply device is characterized in that the portion is attached to the molten metal storage casing so as to be at the same position as the molten metal storage upper limit position or a slightly lower position. In the molten metal supply device according to claim 1,
The molten metal supply device is characterized in that the molten metal discharge portion has a short cylindrical shape and is provided to protrude outward from an outer surface of the molten metal storage casing. In the molten metal supply device according to claim 1,
The molten metal supply apparatus is characterized in that the molten metal introduction pipe is a straight pipe. In the molten metal supply apparatus in any one of Claims 1-3,
Of the side wall surfaces of the previous molten metal storage chamber, at least the side wall surface on the side where the molten metal discharge portion exists is an inclined surface that inclines toward the outside of the previous molten metal storage chamber as it goes to the upper part of the molten metal storage chamber. The molten metal supply apparatus characterized by the above-mentioned. In the molten metal supply apparatus in any one of Claims 1-4,
The rotating mechanism supports the molten metal storage casing so that the molten metal storage casing can maintain an upright posture with its own weight when no rotational force is applied to the molten metal storage casing. apparatus. A molten metal storage method for storing molten metal in the molten metal supply device according to claim 1,
In a state where the molten metal storage housing is held in an upright posture, the molten metal is sucked by a negative pressure to at least the position of the upper end portion of the molten metal introduction pipe,
After releasing the negative pressure, the molten metal storage casing is rotated by a predetermined amount so that the molten metal discharge port moves upward, so that a part of the molten metal sucked into the molten metal storage chamber is removed. A molten metal returning step for returning from the molten metal introducing pipe to the melting furnace;
A molten metal storage housing posture return step for returning the molten metal storage housing posture so that the molten metal storage housing is in an upright posture after completion of the molten metal returning step;
The molten metal storage method characterized by having.

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