JP2004188490A - Molten metal supply container, molten metal introduction system and transport vehicle - Google Patents

Abstract

An object of the present invention is to provide a molten metal supply container and a molten metal introduction system capable of reliably detecting that the inside of the container is full.
A first through third through-holes (65a-65c) penetrating inside and outside of a container (100) are provided at a position separated by a predetermined distance from the center of a hatch (62). The first through hole 65a is provided on the pipe 56 side, and the second through hole 65b and the third through hole 65c are provided on the opposite side to the first through hole 65a. Plugs 68a, 68b constituting one of the couplers are attached to the first and second through holes 65a, 65b. A first socket 70a in which a first electrode rod 69a is inserted is attached to the first through hole 65a, and a second socket 70a in which a second electrode rod 69b is inserted is inserted into the second through hole 65b. The socket 70b is attached. Each plug and socket make up a coupler.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a molten metal supply container, a molten metal introduction system, and a transport vehicle.
[0002]
[Prior art]
In a factory where aluminum is formed using a large number of die-casting machines, an aluminum material is often supplied not only inside the factory but also outside the factory. In this case, a ladle containing molten aluminum is transported from a factory on the material supply side to a factory on the molding side, and the material in the molten state is supplied to each die casting machine. .
[0003]
Ladles that have been used in the past have a structure similar to a teapot in which a supply pipe is attached to the side wall of the container body in which the molten metal is stored. The supply of molten metal has been performed.
[0004]
However, in such a ladle, for example, the ladle is tilted using a forklift, and such work is not necessarily safe. Further, it is necessary to provide a rotating mechanism in the forklift for tilting the ladle greatly (inclination / rotation operation), so that the configuration is special. Further, for such an operation, an operator skilled in operation of the forklift is required. There was a problem that it was needed.
[0005]
Therefore, a system has been proposed in which molten metal is supplied to a holding furnace by applying pressure to a container. By employing such a differential pressure type container, not only safety and workability are improved, but also more detailed supply service becomes possible (for example, see Patent Document 1).
[0006]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 3-31063 (FIG. 1).
[0007]
[Problems to be solved by the invention]
In such a conventional ladle, the molten metal is introduced into the ladle by opening a lid provided above the ladle and pouring the molten metal into the lid.
[0008]
On the other hand, the present inventors have proposed a method in which the pressure inside the closed vessel is reduced and molten metal is externally introduced into the vessel via, for example, a lead-out pipe. When such a method is adopted, it is required to reliably detect that the inside of the container is full when the molten metal is introduced.
[0009]
Therefore, an object of the present invention is to provide a molten metal supply container and a molten metal introduction system that can reliably detect that the inside of the container is full.
[0010]
[Means for Solving the Problems]
In order to solve this problem, the molten metal supply container according to the main aspect of the present invention can accommodate molten metal, communicates with a container having a first opening at the top, and inside and outside of the container, A flow path through which molten metal can flow, a lid disposed to cover the first opening of the container, and a second opening having a smaller diameter than the first opening; A hatch provided on the upper surface of the container so as to be openable and closable, and provided with first and second through holes communicating between the inside and the outside of the container, and a hatch attached to the first through hole to constitute a first coupler 1 plug and a second plug attached to the second through-hole and forming a second coupler.
[0011]
Here, the plug that constitutes the coupler refers to a plug in which the coupler is composed of a plug and a socket, one of which is a plug. For example, the plug is attached to the through hole and can be hermetically connected to the socket.
[0012]
In the present invention, for example, a first socket in which a first electrode rod is inserted is attached to a first plug, and a second socket in which a second electrode rod is inserted is attached to a second plug. The fullness of the molten metal can be reliably detected by positioning the tip of the electrode rod at a predetermined level such as the liquid level when the molten metal is full and detecting conduction between these electrode rods. Alternatively, a plurality of liquid levels may be detected using a plurality of electrodes having different lengths.
[0013]
Usually, the container is preheated by a heater such as a gas burner before the molten metal is supplied into the container. This preheating is performed by opening the hatch and inserting a part of the heater into the container. Therefore, the hatch is opened each time the molten metal is supplied into the container. Even if it is not opened each time, it is configured so that it can be easily opened whenever necessary.
[0014]
In the present invention, since the first and second through-holes in which the plug is attached to such a hatch are provided, every time the molten metal is supplied into the container, the metal is adhered to the first and second through-holes. You can check. In particular, the distance between the electrode rod inserted into the socket to be attached to the plug and the inner peripheral edge of the surrounding through hole is not so large, and if metal is interposed between them, short-circuit failure occurs. Confirms the adhesion of metal to the through-holes, and peels off the metal when it adheres, thereby establishing insulation between the electrode and the surrounding area, such as the hatch, and preventing short-circuit failure due to metal adhesion. can do. Therefore, according to the present invention, it is possible to reliably detect that the inside of the container is full.
[0015]
In the present invention, since the electrode rod is inserted into the container by the coupler structure, the electrode rod can be easily attached and detached.
[0016]
The molten metal supply container according to the present invention is characterized in that the second opening is provided substantially at the center of the lid, that is, the hatch is provided substantially at the center of the upper surface of the container.
[0017]
When the container is shaken and the liquid surface is tilted or droplets are scattered, the relative displacement of the liquid surface with respect to the container and the degree to which the liquid droplets are scattered are smaller when the liquid surface is closer to the center than near the outer periphery of the container. In the present invention, since the hatch having the above-described through-hole is provided substantially at the center of the upper surface portion of the container corresponding to the position where the displacement of the liquid surface and the degree of scattering of the droplet are small as described above, the metal is formed through the through-hole. There is little opportunity to adhere to the surface, and there is actually little adhesion. Therefore, according to the present invention, short-circuit failure due to adhesion of metal can be prevented. Therefore, according to the present invention, it is possible to reliably detect that the molten metal in the container has reached a predetermined liquid level (for example, it is full), and it is possible to improve safety.
[0018]
A molten metal supply container according to another aspect of the present invention can accommodate a molten metal, communicates the inside and outside of the container with a container having a first opening at an upper portion, and circulates the molten metal. And a lid having a second opening smaller in diameter than the first opening, the lid being disposed so as to cover the first opening of the container, and being openable and closable on an upper surface of the lid. A hatch provided with a through-hole communicating the inside and outside of the container, a plug attached to the through-hole and forming a coupler, and means for grounding molten metal stored in the container. It is characterized by having.
[0019]
According to the present invention, the number of through holes and couplers can be reduced, so that the possibility of short-circuit failure can be further reduced. Therefore, according to the present invention, it is possible to more reliably detect that the container is full.
[0020]
INDUSTRIAL APPLICABILITY The molten metal supply container according to the present invention is applied to a system that depressurizes the inside of a container and introduces the molten metal into the container from outside via a flow path. In that case, the system comprises means for reducing the pressure in the container, means for measuring the weight of the molten metal supply container, and a short circuit between the first electrode rod and the second electrode rod, or Means for detecting a short circuit between a third electrode rod and the ground; and, when the measured weight exceeds a predetermined value, or when the short circuit is detected, the depressurization in the container is stopped and restarted. And a means for applying pressure.
[0021]
Here, "when the measured weight is equal to or more than a predetermined value or when the short circuit is detected" means that one of the states has been reached, and the container is in either case. Is deemed to be full, the pressure in the container is stopped, and the pressure is restored to the atmospheric pressure. By making a full judgment based on the two states in this way, it is possible to reliably detect the fullness of the container even when one of the judgments cannot be made or when the judgment is incorrect.
[0022]
It should be noted that such a system configuration may be provided in a transport vehicle that holds and transports the molten metal supply container.
[0023]
In this case, a pair of channel members into which forks (holding members) of a four-lift are inserted and removed are attached to the bottom surface of the molten metal supply container, and the forklift can be used as a transport vehicle. Then, the weight of the molten metal supply container is measured by a pressure sensor provided on the surface of the fork, a hydraulic pressure measuring unit in a hydraulic drive mechanism for driving the fork up and down, a load cell for detecting a rotational moment of the fork, and the like. It is possible.
[0024]
Further, the molten metal supply container according to the main aspect of the present invention can accommodate the molten metal, communicates the inside and outside of the container with the container having the first opening at the top, and circulates the molten metal. And a lid disposed to cover the first opening of the container, and having a second opening having a smaller diameter than the first opening at substantially the center, and an upper surface of the lid And a hatch provided with at least one second through-hole into which an electrode for detecting the liquid level of the container metal in the container can be inserted. And
[0025]
A container capable of accommodating the molten metal and having a first opening at an upper portion; a flow path communicating between the inside and the outside of the container to allow the molten metal to flow therethrough; A cover having a second opening having a diameter smaller than that of the first opening substantially at the center, and provided on the upper surface of the lid so as to be openable and closable, and A hatch provided with a first through hole for internal pressure adjustment communicating therewith and at least one second through hole into which an electrode for detecting a liquid level of the container metal in the container can be inserted; It is characterized by having. There may be a plurality of first through holes and second through holes. Further, an insulating member may be further provided so as to insulate the hatch from the hatch when the electrode is inserted into the through hole.
[0026]
Further, the molten metal supply container of the present invention has a packing capable of hermetically sealing the second through-hole when the electrode is not inserted into the second through-hole, wherein the second A sealing member having the same interface as the electrode with respect to the through hole is further provided.
[0027]
For example, when the inside of the container is depressurized and the molten metal is sucked into the inside, an electrode rod is inserted from the second through hole to detect the liquid level of the molten metal in the container. On the other hand, in other cases (for example, when the molten metal stored inside the container is pressurized and fed out of the container), the second through-hole needs to be hermetically sealed so that a predetermined pressure can be applied. is there. The interface for realizing such a hermetic seal may be realized by a coupler constituted by, for example, a plug and a socket. For example, a plug may be fixed to the second through hole, and a socket that is connected to the plug to realize an airtight connection may be used as a sealing member. On the other hand, if an electrode is attached to a socket of the same specification via an insulating member such as a insulator, an electrode having a common interface with the second through hole and a sealing member can be obtained. . By employing such a configuration, in the molten metal supply container of the present invention, the workability of handling the molten metal supply container can be improved. For example, a multi-stage operation can be performed easily and reliably, for example, when the molten metal is sucked into the vessel and then the molten metal is pumped out of the vessel at the point of use.
[0028]
For the hermetic seal portion such as the above-mentioned sealing member, a resin packing is usually used as a gasket (for example, Viton, NBR, EPR, Perflo, etc.). However, such a packing has a problem that the packing is damaged by being exposed to high heat when the container is preheated. If the packing is damaged, there is a problem that sufficient airtightness cannot be obtained and the inside of the container cannot be pressurized or depressurized to a pressure required for transferring the molten metal. For example, even if a heat-resistant member such as Viton is used, its heat-resistant temperature is about 180 ° C., which is insufficient for the configuration of the molten metal supply container. In the container of the present invention, a second through hole into which an electrode is inserted is provided in the hatch. Since the hatch is open when the container is preheated, the seal is protected from the heat during preheating.
[0029]
Further, a molten metal supply container according to another aspect of the present invention includes a frame, a lining provided inside the frame and having a flow path for flowing molten metal inside and outside, and surrounding the flow path. And a metal pipe buried in the lining and having an oxide layer formed on an inner surface thereof.
[0030]
That is, when detecting the liquid level of the molten metal inside, this container is connected to a metal pipe provided inside the lining to form a flow path and is connected to one of at least one pair of electrodes for detecting a conduction state. It can be used as one. That is, according to the present invention, conduction or short circuit between the pipe and the first to third electrodes can be detected.
[0031]
The electrode should be at the bottom even when detecting a wide liquid level. However, if the electrode is immersed in molten aluminum or the like, the electrode is immediately damaged by heat or a chemical reaction, and the function is not fulfilled. In the present invention, a pipe is used as an electrode in a lining made of a refractory material or a heat insulating material. By adopting such a configuration, the electrode can be shielded from the influence of heat and oxidation during preheating, and since the electrode is not directly attacked by the molten metal, the durability of the electrode can be increased and the molten metal can be improved. The reliability and safety of the supply container can be improved.
[0032]
If the metal pipe is located at a position where it cannot be accessed from the outside, the conductor connected to the first pipe may be drawn to the outside. In this case as well, the frame and the conductor may be insulated as described above.
[0033]
Further, the molten metal supply system of the present invention includes any one of the molten metal supply containers of the present invention, a detection unit that detects a conduction state between the pipe and the electrode, and the pipe and the electrode detected by the detector. And a pressure adjusting unit that adjusts the pressure in the container through the through-hole according to the state of conduction between the container and the pressure control unit.
[0034]
That is, the molten metal supply system detects the liquid level of the molten metal by detecting the conduction state between the electrodes of the above-described container of the present invention, and pressurizes, depressurizes, and returns the pressure of the container according to the result. (Open to the atmosphere). For example, as described above, it is possible to prevent overflow when the molten metal is received in the container.
[0035]
The container according to the main aspect of the present invention is a container capable of storing molten metal, a frame, a lining provided inside the frame, and having an internal flow path for flowing the molten metal inside and outside, at least, And a pipe provided so as to surround a part of the flow path.
[0036]
A container according to another aspect of the present invention is a container capable of storing molten metal, and includes a frame and a flow path of molten metal provided inside the frame and surrounded by a member that regulates gas intrusion. And an inherent lining. Examples of such a member include materials such as metals (including alloys) and ceramics. Further, it is preferable that the layer is composed of a thermodynamically uniform layer in view of macroscopic. In the case of a mixture of materials having different physical properties (for example, casters), that is, when a macroscopically heterogeneous layer is formed, the linear expansion coefficient due to the periodically applied thermal load is reduced. This is because a gas is allowed to enter because a crack or a crack is apt to occur due to a difference or the like. The constituent material of the pipe may be a metal alloy or a homogenized product of a commercially available ceramic fired product.
[0037]
In the present invention, when the pipe is made of metal, it is preferable that a heat insulating layer having fire resistance is formed on the inner wall of the pipe.
[0038]
In the present invention, it is preferable to use a pipe made of ceramics or a pipe in which a refractory material is lined inside a metal pipe. As the metal, for example, SGP, STPT, STPG, or the like can be used. As the refractory material, for example, a refractory material for molten aluminum and molten magnesium (including a refractory caster, a heat insulating material, a heat insulating caster, and the like) can be used. Ceramics, carbon, and graphite may be mixed with these refractory materials. Thereby, the non-wettability of the molten metal to the pipe is improved, and the strength can also be improved. Maintenance is also easy.
[0039]
In the present invention, since the flow path is inherent in the lining, heat conduction from the molten metal reservoir to the flow path is high. For this reason, the heat retention of the molten metal flowing through the flow channel can be enhanced, the fluidity can be maintained, and the flow channel is not clogged. In addition, since the flow path is surrounded by a member that restricts gas from entering, for example, a metal pipe, the pressurizing gas does not leak into the flow path. Therefore, stable supply of the molten metal can be performed. In addition, the metal pipe is used as an electrode for detecting the liquid level of the molten metal as described above.The metal pipe does not break or crack, so the flow path is always maintained and the supply of the molten metal can be continued. it can. Therefore, it is possible to avoid a situation in which the supply of the molten metal cannot be performed suddenly at the supply destination and the container is brought back.
[0040]
Here, from the viewpoint of heat insulation of the flow path, it is preferable that the flow path is present in the lining from a position near the bottom in the container to the upper surface of the container. As an example of the arrangement of the flow path, a lining may be formed on the inner surface of the frame so as to have a raised part that extends in the vertical direction and is convex inside the container, and the flow path may be provided in the raised part. .
[0041]
Further, by adopting a structure in which the flow path is surrounded by a pipe embedded in the lining, and by making this pipe a cartridge, the flow path can be replaced when the flow path is clogged. The pipe may be provided so as to surround a part of the flow path instead of the entire flow path. If the pipe is provided in a part of the lower part of the flow path, it may be difficult to replace the pipe.
[0042]
By employing a structure in which the inner surface of the pipe is covered with a fire-resistant member, the durability of the metal pipe can be increased, and leakage of the pressurizing gas to the flow path for a long time can be prevented. .
[0043]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Overall configuration of metal supply system)
FIG. 1 is a diagram showing an overall configuration of a metal supply system according to an embodiment of the present invention.
[0044]
As shown in FIG. 1, the first factory 10 and the second factory 20 are provided at, for example, distant places via a public road 30.
[0045]
In the first factory 10, a plurality of die cast machines 11 as use points are arranged. Each die cast machine 11 is for molding a product having a desired shape by injection molding using molten aluminum as a raw material. Examples of such products include parts related to automobile engines. Further, as the molten metal, not only an aluminum alloy but also an alloy mainly containing other metals such as magnesium and titanium may be used. Near each die cast machine 11, a holding furnace (hand holding furnace) 12 for temporarily storing the molten aluminum before the shot is arranged. A plurality of shots of molten aluminum are stored in the holding furnace 12, and the molten aluminum is injected from the holding furnace 12 to the die cast machine 11 through the ladle 13 or the pipe for each one shot. It has become. Each holding furnace 12 has a liquid level detection sensor (not shown) for detecting the liquid level of the molten aluminum stored in the container and a temperature sensor (not shown) for detecting the temperature of the molten aluminum. Are located. The detection results of these sensors are transmitted to the control panel of each die cast machine 11 or the central control unit 16 of the first factory 10.
[0046]
The container 100 received in the receiving part of the first factory 10 is delivered to a predetermined die cast machine 11 by the forklift 18 according to the present invention, and molten aluminum is supplied from the container 100 to the holding furnace 12. I have. The supplied container 100 is returned to the receiving portion by the forklift 18 again.
[0047]
The first factory 10 is provided with a first furnace 19 for melting aluminum and supplying the molten aluminum to the container 100. The container 100 supplied with molten aluminum by the first furnace 19 is also moved by a forklift 18. The data is delivered to a predetermined die-casting machine 11.
[0048]
The first factory 10 is provided with a display unit 15 for displaying when addition of molten aluminum is necessary in each die casting machine 11. More specifically, for example, a unique number is assigned to each die cast machine 11, and the number is displayed on the display unit 15, which corresponds to the number of the die cast machine 11 for which addition of molten aluminum is necessary. The number on the display section 15 is turned on. The operator uses the forklift 18 to transport the container 100 to the die cast machine 11 corresponding to the number and supply the molten aluminum based on the display on the display unit 15. The display on the display unit 15 is performed under the control of the central control unit 16 based on the detection result by the liquid level detection sensor.
[0049]
The second factory 20 is provided with a second furnace 21 for melting aluminum and supplying it to the container 100. A plurality of types of containers 100 having different capacities, pipe lengths, heights, widths, and the like are prepared. For example, there are a plurality of types having different capacities depending on the capacity of the holding furnace 12 of the die cast machine 11 in the first factory 10 and the like. The container 100 to which the molten aluminum has been supplied by the second furnace 21 is placed on a transport truck 32 by a forklift. The truck 32 carries the container 100 through the public road 30 to the receiving part of the first factory 10. The empty container 100 in the receiving section is returned to the second factory 20 by the truck 32.
[0050]
The second factory 20 is provided with a display unit 22 for displaying when it is necessary to add molten aluminum to each die casting machine 11 in the first factory 10. The configuration of the display unit 22 is substantially the same as that of the display unit 15 disposed in the first factory 10. The display on the display unit 22 is performed under the control of the central control unit 16 in the first factory 10 via the communication line 33, for example. In the display unit 22 in the second factory 20, it has been determined that the molten aluminum is supplied from the first furnace 19 in the first factory 10 among the die cast machines 11 requiring the supply of molten aluminum. The die cast machine 11 is displayed separately from the other die cast machines 11. For example, the number corresponding to the die cast machine 11 determined as such flashes. Thus, it is possible to prevent the second factory 20 from erroneously supplying the molten aluminum to the die cast machine 11 determined to be supplied with the molten aluminum from the first furnace 19. The display section 22 also displays data transmitted from the central control section 16 in addition to the above.
[0051]
Next, the operation of the metal supply system thus configured will be described.
[0052]
The central controller 16 monitors the amount of molten aluminum in each holding furnace 12 via a liquid level detection sensor provided in each holding furnace 12. Here, when it becomes necessary to supply molten aluminum in a certain holding furnace 12, the central control unit 16 detects the “unique number” of the holding furnace 12 by a temperature sensor provided in the holding furnace 12. "Temperature data" of the holding furnace 12, the "morphological data" relating to the form of the holding furnace 12, the final "time data" when the molten aluminum disappears from the holding furnace 12, the "traffic data" of the public road 30, the holding thereof “Amount data” and “temperature data” of the molten aluminum required in the furnace 12 are transmitted to the second factory 20 via the communication line 33. In the second factory 20, these data are displayed on the display unit 22. Based on these displayed data, the operator empirically determines that the container 100 reaches the holding furnace 12 immediately before the molten aluminum is exhausted from the holding furnace 12 and that the second molten aluminum reaches a desired temperature. The shipping time of the container 100 from the factory 20 and the temperature at the time of sending out the molten aluminum, the preheating temperature and the time of the container. Alternatively, these data are taken into, for example, a personal computer (not shown), and the container 100 reaches the holding furnace 12 immediately before the molten aluminum runs out from the holding furnace 12 using predetermined software, and the molten aluminum at that time has a desired temperature. The time at which the container 100 is dispatched from the second factory 20 and the temperature at which the molten aluminum is dispatched may be estimated, and the time, temperature, and time may be displayed. Alternatively, the temperature of the second furnace 21 may be automatically controlled based on the estimated temperature. The amount of the molten aluminum to be contained in the container 100 may also be determined based on the above “amount data”.
[0053]
When the truck 32 carrying the container 100 departs at the shipping time and arrives at the first factory 10 via the public road 30, the container 100 is received from the truck 32 into the receiving section.
[0054]
Thereafter, the received container 100 is delivered to a predetermined die cast machine 11 by a forklift 18, and molten aluminum is supplied from the container 100 to the holding furnace 12.
(Molten metal supply container)
FIG. 2 is a plan view showing a configuration of a molten metal supply container (container 100) used in such a system, and FIG. 3 is a sectional view taken along line AA in FIG.
[0055]
The container 100 has a large lid 52 disposed in an upper opening 51 of a tubular main body 50 having a bottom. Flanges 53 and 54 are provided on the outer periphery of the main body 50 and the large lid 52, respectively, and the main body 50 and the large lid 52 are fixed by tightening the flanges with bolts 55. The main body 50 and the large lid 52 have, for example, a metal (eg, iron) on the outside and a refractory on the inside, and a heat insulating material is interposed between the outside metal and the refractory.
[0056]
At one place on the outer periphery of the main body 50, a pipe mounting portion 58 provided with a flow path 57 communicating from the inside of the main body 50 to the pipe 56 is provided.
[0057]
The flow path 57 in the pipe attachment portion 58 extends toward an upper portion 57b on the outer periphery of the main body 50 through an opening 57a provided at a position near the container main body bottom 50a on the inner periphery of the main body 50. The pipe 56 is fixed so as to communicate with the flow path 57 of the pipe mounting portion 58.
[0058]
The pipe 56 has an inverted U-shape (a shape having a curvature). The frame 78a of the pipe 56 is made of, for example, a metal such as iron, and has a lining formed therein as a lining. The lining has a refractory material 75. The inside of the lining is formed as a flow path 72 of the molten metal. Examples of the refractory material 75 include a dense refractory ceramic material.
[0059]
In addition, by forming the pipe 56 in an inverted U-shape (shape having a curvature) and correspondingly forming the flow path 72 in an inverted U-shape, the end opening 59 of the pipe 56 is directed downward. It is suitable. When the pipe 56 has such a shape, the molten metal can flow through the flow path 72 smoothly. That is, if there is a discontinuous surface inside the pipe 56, the position is eroded due to the fact that the molten metal hitting the position tends to flow, and eventually there is a problem that a hole is formed. On the other hand, if the flow path 72 of the pipe 56 has a curvature, there is no discontinuous surface, and the above-described problem does not occur. However, the present invention is not limited to such a form of piping.
[0060]
A heat retaining member 56a is provided around the pipe 56 near the pipe mounting portion 58 so as to surround the pipe 56. Thus, it is possible to minimize the occurrence of a decrease in the temperature of the flow path 57 due to the pipe 56 taking the heat of the flow path 57 side. In particular, the periphery of the pipe 56 in the vicinity of the pipe mounting portion 58 is located at a position where the molten metal is easily cooled and the liquid level just sways when the container is transported, so that the molten metal is often solidified. By surrounding the periphery of the pipe 56 near the pipe mounting portion 58 with the heat retaining member 56a, solidification of the molten metal at this position can be prevented.
[0061]
The effective inner diameters of the flow path 57 and the pipe 56 following the flow path 57 are substantially equal, and preferably about 65 mm to 85 mm. Conventionally, the inside diameter of this type of piping has been about 50 mm. This is because if it is more than that, it is considered that a large pressure is required when the inside of the container is pressurized to draw out the molten metal from the pipe. On the other hand, the present inventors consider that the inner diameter of the flow path 57 and the pipe 56 following the flow path is preferably about 65 mm to 85 mm, which is much larger than 50 mm, more preferably about 70 mm to 80 mm, and further more preferably the flow path 57. Was 70 mm, and the inner diameter of the pipe 56 was 80 mm.
[0062]
That is, when the molten metal flows upward through the flow path 57 or the pipe 56, two parameters, namely, the weight of the molten metal itself existing in the flow path 57 or the pipe 56 and the viscous resistance of the inner wall of the flow path or the pipe are changed. It is considered that this has a great effect on the resistance that hinders the flow of metal. Here, when the inner diameter is smaller than 65 mm, the molten metal flowing through the flow path 57 is affected by both the weight of the molten metal itself and the viscous resistance of the inner wall at any position. From the vicinity of the center, a region that is hardly affected by the viscous resistance of the inner wall starts to occur, and the region gradually increases. The effect of this region is very large, and the resistance that hinders the flow of the molten metal begins to drop. When the molten metal is drawn out of the container, the inside of the container may be pressurized with a very small pressure. In other words, conventionally, the influence of such a region is not taken into account at all, and only the weight of the molten metal itself is considered as a variable factor of the resistance that hinders the flow of the molten metal. The inner diameter was about 50 mm. On the other hand, when the inner diameter exceeds 85 mm, the weight of the molten metal itself becomes very dominant as a resistance to hinder the flow of the molten metal, and the resistance to hinder the flow of the molten metal increases. According to the results of the trial production by the present inventors, an inner diameter of about 70 mm to 80 mm may be sufficient to pressurize the pressure in the container with a very small pressure, and 70 mm and 80 mm are most preferable from the viewpoint of standardization and workability. That is, the pipe diameter is standardized in units of 10 mm, such as 50 mm, 60 mm, 70 mm, and so on, and the smaller the pipe diameter, the easier the handling and the better the workability.
[0063]
An opening 60 is provided substantially at the center of the large lid 52, and a hatch 62 to which a handle 61 is attached is arranged in the opening 60. The hatch 62 is provided at a position slightly higher than the upper surface of the large lid 52. One portion of the outer periphery of the hatch 62 is attached to the large lid 52 via a hinge 63. Thereby, the hatch 62 can be opened and closed with respect to the opening 60 of the large lid 52. Further, a bolt 64 with a handle for fixing the hatch 62 to the large lid 52 is attached to two locations on the outer periphery of the hatch 62 so as to face the position where the hinge 63 is attached. The hatch 62 is fixed to the large lid 52 by closing the opening 60 of the large lid 52 with the hatch 62 and rotating the bolt 64 with the handle. The hatch 62 can be opened from the opening 60 of the large lid 52 by reversing the rotation of the bolt 64 with the handle to release the fastening. Then, maintenance of the inside of the container 100 and insertion of the gas burner at the time of preheating are performed through the opening 60 with the hatch 62 opened.
[0064]
At positions separated from the center of the hatch 62 by a predetermined distance, first to third through holes 65a to 65c penetrating the inside and outside of the container 100 are provided. The first through hole 65a is provided on the pipe 56 side, and the second through hole 65b and the third through hole 65c are provided on the opposite side to the first through hole 65a. Thereby, the distance between the first through hole 65a, the second through hole 65b, and the third through hole 65c is longer than the distance between the second through hole 65b and the third through hole 65c. ing.
[0065]
A thread is cut in each of the through holes 65a to 65c. Plugs 68a, 68b constituting one of the couplers are attached to the first and second through holes 65a, 65b. A first socket 70a in which a first electrode rod 69a is inserted is attached to the first through hole 65a, and a second socket 70a in which a second electrode rod 69b is inserted is inserted into the second through hole 65b. The socket 70b is attached. Each plug and socket make up a coupler.
[0066]
FIG. 4 is a view showing an electrode device configured by inserting an electrode rod into the socket according to the present invention.
As shown in FIG. 4, in this apparatus, an insulating tape 81 is wound around the first electrode rod 69a at a position where the first electrode rod 69a is inserted into the first socket 70a, and the first electrode rod 69a is connected to the first socket 70a. 70a. The same applies to the second electrode rod 69b. The length L1 of the first and second electrode rods 69a and 69b thus inserted in the container 100 is set so that their tips contact the liquid surface of the container 100 at the full position of the molten metal. ing.
[0067]
The third through hole 65c is used for internal pressure adjustment for reducing and increasing the pressure in the container 100. The third through-hole 65c is connected to a piping 66 for increasing and decreasing pressure. The pipe 66 extends upward from the third through hole 65c, bends at a predetermined height, and extends horizontally therefrom. A thread is formed on the surface of the portion of the pipe 66 inserted into the through hole 65c, and a thread is also formed on the through hole 65c, so that the pipe 66 is fixed to the through hole 65c by screwing. It is supposed to be.
[0068]
An air hose 67 for pressurization or decompression can be connected to one side of the pipe 66 by a coupler structure (for example, a plug at the tip of the pipe 66 and a socket at the tip of the air hose 67). Then, it is possible to introduce the molten aluminum into the container 100 through the pipe 56 and the flow path 57 using the pressure difference by depressurization, and to use the pressure difference to press the flow path 57 and the pipe 56 using the pressure difference. The molten aluminum can be led out of the container 100 through the container.
[0069]
In the present embodiment, the hatch 62 arranged substantially at the center of the large lid 52 is provided with a through hole 65 for pressurizing and depressurizing, while the pipe 66 extends in the horizontal direction. The operation of connecting the pressure pipe 67 for pressure or pressure reduction to the pipe 66 can be performed safely and easily. Further, since the pipe 66 can be rotated with a small force with respect to the through hole 65 by extending the pipe 66 in this manner, it is very difficult to fix or remove the pipe 66 screwed to the through hole 65. Can be performed with a small force, for example, without using a tool.
[0070]
On the bottom rear surface of the main body 50, for example, two channel members 71 as legs having a predetermined opening length in a cross section into which a fork of a forklift (not shown) is inserted are arranged in parallel, for example. The channel member 71 forms an angle of, for example, 45 ° with the extending direction of the pipe 56.
[0071]
The bottom 50a inside the main body 50 is entirely inclined so that the flow path 57 side becomes lower. Thus, when the molten aluminum is led out to the outside through the flow path 57 and the pipe 56 by pressurization, the so-called remaining hot water is reduced. Further, for example, when the container 100 is tilted and the molten aluminum is led out through the flow path 57 and the pipe 56 during maintenance, the angle at which the container 100 is tilted can be made smaller, and safety and workability are improved. . However, the inclination may be reversed. Thereby, clogging of the opening 57a can be prevented.
[0072]
In the container 100 according to the present embodiment, since the hatch 62 is provided with the first and second through holes 65a and 65b through which the electrode rods for full detection are inserted, each time the hatch 62 is opened, the first and second through holes 65a and 65b are opened. The adhesion of the metal to the second through holes 65a and 65b can be confirmed. Therefore, short-circuit failure of the electrode rod can be eliminated. Further, in the container 100 according to the present embodiment, since the electrode rods 69a and 69b are inserted into the container 100 by the coupler structure, the electrode rods 69a and 69b can be easily attached and detached. Therefore, for example, at times other than the operation of introducing molten aluminum into the container 100, the electrode rods 69a and 69b can be removed from the container 100. Therefore, corrosion of the electrode rods 69a and 69b can be prevented, and the liquid level can be detected accurately. When the electrode rods 69a and 69b are removed from the container 100, a socket (not shown) having a hole closed may be attached to the plugs 68a and 68b. (Molten metal introduction system)
Next, a system configuration for introducing molten metal into the container 100 will be described with reference to FIG.
[0073]
As illustrated in FIG. 5, the forklift 18 holds the container 100 by engaging the fork 41 with the channel member 71 of the container 100. The forklift 18 has a fork 41 and an elevating mechanism 152 that elevates the fork 41 to elevate and lower the container 100. Further, a pressure sensor 153 is arranged on the surface of the fork 41.
[0074]
Above the driver's seat 154 of the forklift 18, a receiver tank (not shown) for supplying gas for pressurizing the container 100, for example, high-pressure air, and a vacuum pump 171 for reducing the pressure in the container 100 are provided. Have been. The receiver tank or the vacuum pump 171 and the container 100 are connected by an air hose 157.
[0075]
The furnace 21 stores molten aluminum. Here, one end 201b of the suction pipe 201 is attached to the pipe 56 of the container 100, the other end 201a is put into the molten aluminum stored in the furnace 21, and the suction pipe 201 is fixed by the holding mechanism 202. I do. Then, in this state, the pressure in the container 100 is reduced by the vacuum pump 171 so that molten aluminum is introduced into the container 100.
[0076]
FIG. 6 is a diagram showing a configuration of a control system of the molten metal introduction system configured as described above.
The control unit 210 includes a short-circuit detection unit 211 that detects a short circuit between the electrode rod 69a and the electrode rod 69b, and a weight estimated that the inside of the container 100 is filled with the molten aluminum by a signal from the pressure sensor 153. , A OR circuit 213 for calculating the logical sum of the detection of the short circuit by the short circuit detection unit 211 and the detection of the full weight by the weight detection unit 212, and the OR circuit 213. It has a valve on / off control unit 214 for controlling on / off of an on / off valve 216 inserted between the air hose 157 and the vacuum pump 171 according to the output.
[0077]
When the vacuum pump 171 is operated and the on / off valve 216 is turned on, molten aluminum is introduced into the container 100 via the pipe 56 of the container 100. Then, when the inside of the container 100 is filled with the molten aluminum, this is detected by the short-circuit detecting unit 211 or the weight detecting unit 212. When any one of the short-circuit detecting unit 211 and the weight detecting unit 212 detects that the valve is full, the valve on-off control unit 214 regards it as full and turns off the on-off valve 216. Thereby, the introduction of the molten aluminum into the container 100 is stopped, and the pressure in the container is restored to the atmospheric pressure.
[0078]
In this embodiment, since the full state of the container 100 is detected using the detection system of two independent routes of the short-circuit detection route and the weight detection route, the detection can be reliably performed. However, in the present invention, such a full detection may be performed only by the short-circuit detection route. Alternatively, another detection system different from the weight detection route may be used in addition to the short-circuit detection route.
(Other weight detection method 1)
FIG. 7 is a view showing a fork lifting mechanism in the forklift 18 described above.
[0079]
As shown in FIG. 7, a fork 401 in the forklift 18 is driven up and down by a hydraulic cylinder 402. A hydraulic gauge 403 for detecting the pressure in the hydraulic cylinder 402 is disposed on the hydraulic cylinder 402. Have been. The detection result of the oil pressure gauge 403 is sent to the control unit 215.
[0080]
In the present embodiment, the control unit 215 estimates the weight of the molten metal supplied to the container 100 held by the fork 401 according to the detection result by the oil pressure gauge 403.
[0081]
Since the oil pressure gauge 403 in the hydraulic cylinder 402 is not affected by the heat of the molten metal in the container 100, there is no adverse effect due to the high temperature and the durability is high. In addition, since the weight of the molten metal supplied to the outside from the container 100 is measured, the supply amount of the molten metal can be measured more accurately than, for example, when the weight is estimated from the liquid level. .
(Other weight detection method 2)
FIG. 8 is a view for explaining still another weight detection method, and shows a part of a forklift.
[0082]
As shown in FIG. 8, the fork 501 of the forklift 18 is connected to the backrest 503 via the scale 502. The backrest 503 is driven up and down along a pole 504 by a lifting hydraulic cylinder (not shown).
[0083]
The scale section 502 is provided with a load cell 505 for detecting a rotational moment of the fork 501. The measurement result by the load cell 505 is transmitted to a control unit (not shown), and the control unit controls the introduction of the molten metal into the container 100 as in the above-described embodiment.
[0084]
In the present embodiment, in particular, since the load cell 505 is arranged between the fork 501 and the backrest 503, workability is improved and safety is improved as compared with a case where the load cell is directly arranged on the fork. In addition, since the rotational moment only needs to be measured by the load cell 505, the weight measurement can be performed by one load cell 505.
(Other example of molten metal supply container 1)
FIG. 9 is a view showing another example of the molten metal supply container according to the present invention.
In the container 100 according to the present embodiment, the hatch 62 is provided with a through hole through which an electrode bar for detecting fullness is inserted, and this is set as one through hole 601. The electrode rod 603 is inserted into the container 100 through the through hole 601 via the socket 602. An electrode plate 604 for grounding is arranged, for example, at the bottom of the container 100. The electrode plate 604 is grounded, for example, by being electrically connected to the container 100. Thereby, the molten aluminum in the container 100 is grounded. In this embodiment, by detecting a short circuit between the electrode rod 603 and the ground, it is possible to detect the fullness of the molten aluminum in the container 100.
[0085]
If the molten aluminum in the container 100 is grounded, the installation electrode plate 604 may be provided positively as described above.
(Other example of molten metal supply container 2)
FIG. 10 is a view showing still another example of the molten metal supply container according to the present invention.
In the container 100 according to the present embodiment, the lengths of the two electrode rods 769a and 769b in the container 100 are different. For example, the length L2 of the electrode rod 769a in the container 100 is shorter than the length L3 of the electrode rod 769b in the container 100. Further, an electrode plate 704 for grounding is arranged, for example, at the bottom of the container 100. Note that, similarly to the above-described embodiment, if the molten aluminum in the container 100 is grounded, it is not necessary to provide such an electrode plate 704 positively.
[0086]
FIG. 11 is a diagram showing a configuration of a control system in such a container 100.
[0087]
The first short detection section 701 detects a short between the electrode bar 769a and the ground. Further, the second short-circuit detecting unit 702 detects a short-circuit between the electrode bar 769b and the ground. The first short-circuit detecting unit 701 detects the first liquid level of the molten aluminum in the container 100, and the second short-circuit detecting unit 702 detects the second liquid level lower than the first liquid level of the molten aluminum in the container 100. Can be detected.
[0088]
Here, if the first liquid level is set to the full position of the molten aluminum in the container 100 and the second liquid level is set to the position immediately before the full state, for example, the second short-circuit detecting unit 702 is set to the position immediately before the full state. It can be used as notification means.
[0089]
Then, for example, the pressure reduction by the vacuum pump is gradually reduced when immediately before the full state is detected, and the pressure reduction can be completely stopped when the first short-circuit detection unit 701 detects the full state. Thus, the inside of the container 100 can be accurately filled.
[0090]
Further, for example, when the first short-circuit detecting unit 701 does not detect the full state even after a predetermined time has elapsed after the second short-circuit detecting unit 702 detects the state immediately before the full state, the depressurization is regarded as being full, and the pressure reduction is stopped. You may. This makes it possible to more reliably detect the full state.
[0091]
Of course, in addition to the detection of fullness by such a short-circuit detection route, the above-described detection of fullness by the weight detection route may be configured to be controlled by a logical sum condition. This makes it possible to more reliably detect the full state.
[0092]
The first short-circuit detecting unit 701 detects a short-circuit between the first electrode bar and the ground, but detects a short-circuit between the first electrode bar and the second electrode bar. You may do it. Alternatively, the logical sum of the short circuit between the first electrode rod and the ground and the short circuit between the first electrode rod and the second electrode rod may be calculated.
(Other example 3 of molten metal supply container)
12 and 13 are views showing still another example of the molten metal supply container according to the present invention.
The hatch 62 is provided with four first to fourth through holes 865a to 865d for electrode rod insertion. Plugs 868a to 868d constituting one of the couplers are attached to the through holes 865a to 865d.
[0093]
The first to fourth electrode rods 869a to 869d inserted into the socket are inserted into the first to fourth through holes 865a to 865d. Here, the first electrode rod 869a and the second electrode rod 869b have the same length in the container 100, the third electrode rod 869c and the fourth electrode rod 869d have the same length in the container 100, and The length L4 of the first electrode rod 869a and the second electrode rod 869b in the container 100 is shorter than the length L5 of the third electrode rod 869c and the fourth electrode rod 869d in the container 100. .
[0094]
FIG. 14 is a diagram showing a configuration of a control system in such a container 100.
[0095]
The first short-circuit detector 901 detects a short circuit between the first electrode bar 869a and the second electrode bar 869b. Further, second short-circuit detecting section 902 detects a short-circuit between third electrode rod 869c and fourth electrode rod 869d. The first short-circuit detecting section 901 detects the first liquid level of the molten aluminum in the container 100, and the second short-circuit detecting section 902 detects the second liquid level lower than the first liquid level of the molten aluminum in the container 100. Can be detected. Thus, the same operation and effect as those of the above-described embodiment can be obtained.
[0096]
The present invention naturally includes a combination of the components shown in the embodiments within a reasonable range.
(Other example 4 of molten metal supply container)
Next, another embodiment of the present invention will be described with reference to FIG.
The container 101 according to this embodiment is different from the above embodiment in the structure of the flow path. That is, a lining 101b having a convex portion 101c which is a protruding portion inward in the vertical direction is provided inside the frame 101a. The lining 101b preferably has a laminated structure of a refractory layer and a heat insulating layer, as in the above embodiment. These materials may be the same as in the above embodiment. A flow path 109 penetrating from a position near the inner bottom of the container 101 to an upper surface side of the container 101 is provided in the convex portion 101c.
[0097]
The flow path 109 is surrounded by a pipe 134 made of metal such as iron. For example, the lower end face of the pipe 134 is exposed to the molten metal storage portion and is in conduction with the molten metal, and functions as the above-described electrode of the present invention. The inner wall of the pipe 134 is covered with a refractory material 134b. Thereby, the heat resistance of the pipe 134 is improved. The pipe 134 is embedded in the lining 101b via the filler 110. The filler 110 has lower strength than the lining 101b. These materials may be the same as in the above embodiment. When the pipe 134 is not used, a problem that a pressurized gas or the like intrudes into the flow channel through cracks or the like of the lining layer 101c easily occurs. According to the present invention, such a gas can be prevented from entering. Therefore, stable supply of the molten metal can be performed.
[0098]
For example, a pipe 108 is detachably connected to an upper portion of the flow path 109. The pipe 108 is made of, for example, iron, and may have an R shape. This is because the molten metal flows more smoothly. The inner diameter of the flow path 109 and the pipe 108 following the flow path 109 are substantially equal, and are preferably about 65 mm to 85 mm.
[0099]
A first flange 134a is provided at an upper end of the pipe 134, and a second flange 105a that is in contact with the lower surface of the first flange 134a is provided on the frame 101a so as to surround the circumference of the pipe 134. Here, the outer diameter of the first flange 134a is smaller than the outer diameter of the second flange 105a. Thereby, the heat radiated from the pipe 134 can be further reduced, and the heat retaining effect of the flow path 109 can be enhanced. Of course, a structure as shown in FIG. 16 may be adopted. The flange 108a of the pipe 108 is fixed to the container 101 via a bolt (not shown). A packing is interposed between the flanges.
[0100]
In the present embodiment, in particular, since the flow path 109 penetrates through the inside of the convex portion 101c, which is a bulging portion of the lining, from a position near the bottom of the container 101 to the upper surface side of the container 101 like a tunnel, the flow path 109 is surrounded. The area of the inner wall of the container 101 is substantially increased, and the amount of heat transferred from the molten aluminum contacting the inner wall of the container 101 to the flow path 109 is increased. Therefore, the heat retention of the flow path 109 can be enhanced, and the fluidity of the molten metal can be maintained. On the other hand, since the molten metal and the pipe have the same potential due to fine cracks in the lining layer, the function as an electrode is not hindered.
[0101]
In the present invention, in order to positively supply heat from the storage portion of the molten metal in the container to the pipe 286 side as the flow path, the above-mentioned raised portion 402 is provided inside the lining 273, and a tunnel is provided in the raised portion like a tunnel. A hole serving as a flow path is provided. Further, in the present invention, in order to prevent the gas caused by cracks in the lining, etc., from entering into the flow path of the molten metal (for example, molten aluminum alloy, molten magnesium alloy, etc.) in the frame (pressurized gas is likely to enter. ), A rigid pipe such as a metal pipe 286 is adopted to prevent gas from entering, and a method of fixing the pipe 286 has a replaceable cartridge structure. By using a cartridge structure for the piping, it is necessary to rebuild almost the entire lining of the container every time the piping 286 is replaced, resulting in a very high cost. However, the piping is formed in a cartridge structure as in the present invention. This makes it possible to simply and inexpensively replace only the piping. Further, since the pipe holding layer 405 has lower rigidity and strength than the frame lining caster and the pipe, the pipe holding layer also functions as a layer for relieving stress caused by thermal deformation of the pipe.
[0102]
FIG. 16 is a sectional view showing the structure of the upper end portion of the pipe 110 of FIG. 15, and FIG. 17 is a view taken along the line BB in FIG.
[0103]
As described above, the metal pipe 404 is embedded in the lining layer including the layer made of the refractory material 402 via the filler 405 serving as the pipe holding layer. In other words, the pipe 404 is a hole provided in the refractory material 402. A filler 405 is interposed between the hole 411 and the pipe 404 as a pipe holding layer. The inner surface of the pipe 404 is lined with a refractory material layer 404b.
[0104]
The pipe 404 has a flange 412 on the upper surface side of the container 401. For example, three holding claws 414 for holding the back surface 413 of the flange 412 project from the inner wall of the frame 271. This claw may be formed of a member such as a round bar of an iron alloy.
[0105]
A flange 415 is provided on the upper surface of the container 401 so as to surround the flange 412 as the first flange and to have a flange receiving surface at a position higher than the height of the surface of the flange 412. A flange 417 of a pipe 416 communicating with the flow path 403 is fixed to the flange 415 by, for example, a bolt or a clamp. In the pipe 416, a refractory material 416b is formed on the inner wall of the steel shell 416a. That is, the flange surface (lower surface) of the flange 417 (second flange) of the pipe 416 and the flange surface (upper surface) of the first flange are separated by the interval t1. If t1 is set to 1 mm to 5 mm, sufficient stress relaxation ability and heat insulation ability are exhibited. Further, since the pipe holding layer 405 has lower rigidity and strength than the caster of the lining of the frame and the pipe, the pipe holding layer also functions as a layer for relieving stress caused by thermal deformation of the pipe.
[0106]
A packing 418 having a first thickness t1 is interposed between the surface of the flange 412 and the surface of the flange 417, and the first thickness t1 is provided between the surface of the flange 415 and the surface of the flange 417. A packing 419 having a smaller second thickness t2 is interposed. These packings may be selected from those having heat resistance. Further, for example, a sheet-like heat insulating member 420 (for example, ceramic paper) is interposed between the back surface of the flange 412 and the holding claw 414. Thereby, the heat insulation between the claw portion 414 and the first pipe is improved, and the frame and the first pipe are insulated.
[0107]
The pipe 404 or the flange 412 is electrically connected to the outside of the frame by the conductor 450. 451 is a insulator for insulation.
[0108]
In the present embodiment, particularly with the above structure, the pipe 404 is not in contact with the frame 271 which is a good conductor of heat and electricity. In particular, the flange 412 is held by the holding claws 414. Therefore, since the heat held by the pipe 404 is not easily diffused, a decrease in the temperature of the pipe 404 can be suppressed. Therefore, clogging of the pipe 404 can be prevented. In the present embodiment, the packing 418 between the surface of the flange 412 and the surface of the flange 417 is thicker than the packing 419 between the surface of the flange 415 and the surface of the flange 417. The degree of freedom of the flange 412 is high. Therefore, cracks in the pipe 414, particularly near the flange 412, can be suppressed as much as possible. This can prevent gas from leaking from the inside of the container.
[0109]
Here, reference numeral 430 is a hole for injecting the filler 405, and reference numeral 431 is a hole for letting out gas when the filler 405 is injected from the hole 430. The holes 430 and 431 are closed by caps 432 and 433. Thus, it is preferable to provide at least two holes. This is because when the filler is injected through one hole, the gas is released through the other hole, and the completion of the filling can be known.
[0110]
【The invention's effect】
As described above, according to the present invention, it is possible to reliably detect that the inside of the container is full.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a configuration of a metal supply system according to an embodiment of the present invention.
FIG. 2 is a plan view showing a configuration of a molten metal supply container used in the metal supply system shown in FIG.
FIG. 3 is a sectional view taken along line AA in FIG. 2;
FIG. 4 is a view showing an electrode device configured by inserting an electrode rod into a socket according to the present invention.
FIG. 5 is a diagram showing a configuration of a molten metal introduction system according to the present invention.
6 is a diagram showing a configuration of a control system of the molten metal introduction system shown in FIG.
FIG. 7 is a diagram showing another example (part 1) of the weight detection method according to the present invention.
FIG. 8 is a diagram showing another example (part 2) of the weight detection method according to the present invention.
FIG. 9 is a view showing another example (No. 1) of the molten metal supply container according to the present invention.
FIG. 10 is a view showing another example (part 2) of the molten metal supply container according to the present invention.
11 is a diagram showing a configuration of a control system using the molten metal supply container shown in FIG.
FIG. 12 is a plan view showing another example (part 3) of the molten metal supply container according to the present invention.
13 is a partial sectional view of the molten metal supply container shown in FIG.
FIG. 14 is a diagram showing a configuration of a control system using the molten metal supply container shown in FIGS. 12 and 13.
FIG. 15 is a partial cross-sectional view of the molten metal supply container of the present invention.
FIG. 16 is a sectional view showing the structure of the upper end of the pipe 110 of FIG. 15;
17 is a view as viewed in the direction of arrows BB in FIG. 16;
[Explanation of symbols]
18 Forklift
41 fork
50 body
51 Upper opening
52 Large Lid
56 piping
57 Channel
60 opening
62 Hatch
65a First through hole
65b Second through hole
68a, 68b plug
69a first electrode rod
69b second electrode rod
71 channel member
153 pressure sensor
157 air hose
171 vacuum pump
210 control unit
211 Short circuit detector
212 Weight detector
213 OR circuit
214 Valve on / off control unit
216 On-off valve
404 plumbing
404b lining
412 flange
450 conductor
451 insulator

Claims (10)

A container capable of containing molten metal and having a first opening at the top;
A flow path that communicates the inside and outside of the container and can flow the molten metal,
A lid arranged to cover the first opening of the container, and having a second opening having a smaller diameter than the first opening at substantially the center;
A hatch provided on the upper surface of the lid so as to be openable and closable, and provided with at least one second through hole into which an electrode for detecting a liquid level of the container metal in the container can be inserted. A molten metal supply container characterized in that: A container capable of containing molten metal and having a first opening at the top;
A flow path that communicates the inside and outside of the container and can flow the molten metal,
A lid arranged to cover the first opening of the container, and having a second opening having a smaller diameter than the first opening at substantially the center;
A first through hole for internal pressure adjustment, which is provided on the upper surface of the lid so as to be openable and closable between the inside and outside of the container, and an electrode for detecting a liquid level of the container metal in the container may be inserted. A hatch provided with at least one possible second through hole;
A molten metal supply container comprising: When the electrode is not inserted in the second through-hole, the second through-hole has a packing capable of hermetically sealing the same, and the second through-hole has the same shape as the electrode. The molten metal supply container according to claim 1 or 2, further comprising a sealing member having an interface. A container capable of containing molten metal and having a first opening at the top;
A flow path that communicates the inside and outside of the container and can flow the molten metal,
A lid disposed to cover the first opening of the container, the lid having a second opening smaller in diameter than the first opening;
A hatch provided on the upper surface of the lid so as to be openable and closable, and provided with first and second through holes communicating between the inside and the outside of the container;
A first plug attached to the first through-hole and forming a first coupler;
A second plug attached to the second through-hole and forming a second coupler; and a molten metal supply container. A container for supplying molten metal according to claim 4,
A first socket constituting the first coupler and having a first electrode rod inserted therein;
A molten metal supply container, comprising a second socket constituting the second coupler and having a second electrode rod inserted therethrough. The molten metal supply container according to any one of claims 1 to 5, wherein the second opening is provided substantially at the center of the lid. . The container is
Frame and
A lining provided inside the frame and having a flow path for flowing molten metal inside and outside,
7. The molten metal according to claim 1, further comprising: a metal pipe buried in the lining so as to surround the flow path, and having a refractory layer formed on an inner surface thereof. Supply container. A molten metal supply container according to claim 7,
A detecting unit that detects a conductive state between the pipe and the electrode; and a pressure adjusting unit that adjusts a pressure in the container through the through hole according to a conductive state between the pipe and the electrode. A molten metal supply system characterized by: A system for depressurizing the inside of the molten metal supply container according to claim 4 and introducing molten metal into the container from outside via the flow path,
Means for reducing the pressure in the container,
Means for measuring the weight of the molten metal supply container,
Means for detecting a short circuit between the first electrode rod and the second electrode rod;
Means for stopping pressure reduction in the container when the measured weight becomes equal to or more than a predetermined value or when the short circuit is detected. A holding member for holding the molten metal supply container according to claim 4,
Means for reducing the pressure in the container in the molten metal supply container,
Means for measuring the weight of the molten metal supply container,
Means for detecting a short circuit between the first electrode rod and the second electrode rod;
Means for stopping the decompression in the container when the measured weight exceeds a predetermined value or when the short circuit is detected.

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